Java Code Examples for android.widget.RadioGroup#setOnCheckedChangeListener()

/**
 * setupTabs()
 */
private void setupTabs() {
    mTabsRadioGroup = (RadioGroup) mControlsLayout.findViewById(R.id.NavRadioGroup);
    mGenericHidViewFlipper = (ViewFlipper) mControlsLayout.findViewById(R.id.MainViewFlipper);
    
    mTabsRadioGroup.setOnCheckedChangeListener(new RadioGroup.OnCheckedChangeListener() {
        
        @Override
        public void onCheckedChanged(RadioGroup group, int checkedId) {
            
            switch (checkedId) {
            case R.id.TouchpadRadioButton:
                mGenericHidViewFlipper.setDisplayedChild(0);
                break;
            case R.id.NavKeysRadioButton:
                mGenericHidViewFlipper.setDisplayedChild(1);
                break;
            case R.id.MediaKeysRadioButton:
                mGenericHidViewFlipper.setDisplayedChild(2);
                break;
            }
            
        }
    });
}
 

private void setupViews() {

        mLoadingView = findViewById(R.id.loading_layout);
        mUsersAdapter = new UsersAdapter();
        mTopicsAdapter = new TopicsAdapter();
        mRadioGroup = (RadioGroup) findViewById(R.id.radio_group);

        mListView = (ListView) findViewById(android.R.id.list);
        mEmptyView = findViewById(android.R.id.empty);
        mListView.setEmptyView(mEmptyView);
        mListView.setAdapter(mTopicsAdapter);
        mListView.setOnItemClickListener(this);

        mUsersBtn = (RadioButton) findViewById(R.id.users_btn);
        mTopicsBtn = (RadioButton) findViewById(R.id.topics_btn);
        mRadioGroup.setOnCheckedChangeListener(this);
    }
 

@Nullable
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
    View view = inflater.inflate(R.layout.fragment_scenes, container, false);

    RadioGroup radioGroup = (RadioGroup) view.findViewById(R.id.select_scene);
    radioGroup.setOnCheckedChangeListener(this);
    mSceneRoot = (ViewGroup) view.findViewById(R.id.scene_root);

    // A Scene can be instantiated from a live view hierarchy.
    mScene1 = new Scene(mSceneRoot, mSceneRoot.findViewById(R.id.container));

    // You can also inflate a generate a Scene from a layout resource file.
    mScene2 = Scene.getSceneForLayout(mSceneRoot, R.layout.scene2, getContext());

    // Another scene from a layout resource file.
    mScene3 = Scene.getSceneForLayout(mSceneRoot, R.layout.scene3, getContext());

    // We create a custom TransitionManager for Scene 3, in which ChangeBounds, Fade and
    // ChangeImageTransform take place at the same time.
    mTransitionManagerForScene3 = TransitionInflater.from(getContext())
        .inflateTransitionManager(R.transition.scene3_transition_manager, mSceneRoot);

    return view;
}
 

private void initView(){
	rgLocationMode = (RadioGroup) findViewById(R.id.rg_locationMode);
	
	etInterval = (EditText) findViewById(R.id.et_interval);
	etHttpTimeout = (EditText) findViewById(R.id.et_httpTimeout);
	
	cbOnceLocation = (CheckBox)findViewById(R.id.cb_onceLocation);
	cbGpsFirst = (CheckBox) findViewById(R.id.cb_gpsFirst);
	cbAddress = (CheckBox) findViewById(R.id.cb_needAddress);
	cbCacheAble = (CheckBox) findViewById(R.id.cb_cacheAble);
	cbOnceLastest = (CheckBox) findViewById(R.id.cb_onceLastest);
	cbSensorAble = (CheckBox)findViewById(R.id.cb_sensorAble);

	tvResult = (TextView) findViewById(R.id.tv_result);
	btLocation = (Button) findViewById(R.id.bt_location);
	
	rgLocationMode.setOnCheckedChangeListener(this);
	btLocation.setOnClickListener(this);
}
 

/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
	if (BuildConfig.DEBUG) {
		Log.e(Constants.LOG, "onCreate called");
	}
	super.onCreate(savedInstanceState);
	setContentView(R.layout.main);
	RadioGroup group1 = (RadioGroup) findViewById(R.id.orientation);
	group1.setOnCheckedChangeListener(new OnCheckedChangeListener() {
		@Override
		public void onCheckedChanged(RadioGroup group, int checkedId) {
			switch (checkedId) {
			case R.id.horizontal:
				group.setOrientation(LinearLayout.HORIZONTAL);
				break;
			case R.id.vertical:
				group.setOrientation(LinearLayout.VERTICAL);
				break;
			}
		}
	});

}
 

/**
 * 初始化AMap对象
 */
private void init() {
	if (aMap == null) {
		aMap = mapView.getMap();
		mUiSettings = aMap.getUiSettings();
	}
	Button buttonScale = (Button) findViewById(R.id.buttonScale);
	buttonScale.setOnClickListener(this);
	CheckBox scaleToggle = (CheckBox) findViewById(R.id.scale_toggle);
	scaleToggle.setOnClickListener(this);
	CheckBox zoomToggle = (CheckBox) findViewById(R.id.zoom_toggle);
	zoomToggle.setOnClickListener(this);
	zoomRadioGroup = (RadioGroup) findViewById(R.id.zoom_position);
	zoomRadioGroup.setOnCheckedChangeListener(this);
	CheckBox compassToggle = (CheckBox) findViewById(R.id.compass_toggle);
	compassToggle.setOnClickListener(this);
	CheckBox mylocationToggle = (CheckBox) findViewById(R.id.mylocation_toggle);
	mylocationToggle.setOnClickListener(this);

}
 

private void initLoading() {
    vLoading = LayoutInflater.from(this).inflate(R.layout.include_circleprogressbar_loading,
            vgControl, false);
    RadioGroup rgProgressMode = vLoading.findViewById(R.id.cpb_rg_progress_mode);
    rgProgressMode.setOnCheckedChangeListener(this);
    SeekBar sbLoadingStartAngle = vLoading.findViewById(R.id.cpb_sb_loading_start_angle);
    sbLoadingStartAngle.setOnSeekBarChangeListener(this);
    SeekBar sbLoadingSweepAngle = vLoading.findViewById(R.id.cpb_sb_loading_sweep_angle);
    sbLoadingSweepAngle.setOnSeekBarChangeListener(this);
    SeekBar sbLoadingDuration = vLoading.findViewById(R.id.cpb_sb_loading_duration);
    sbLoadingDuration.setOnSeekBarChangeListener(this);
    RadioGroup rgRepeatMode = vLoading.findViewById(R.id.cpb_rg_repeat_mode);
    rgRepeatMode.setOnCheckedChangeListener(this);
    Switch stDrawOther = vLoading.findViewById(R.id.cpb_st_loading_draw_other);
    stDrawOther.setOnCheckedChangeListener(this);
}
 

@Override
public void onViewCreated(@NonNull View view, @Nullable Bundle savedInstanceState) {
    super.onViewCreated(view, savedInstanceState);

    // Update ActionBar
    setActionBarTitle(R.string.thermalcamera_tab_title);

    // UI
    mUartWaitingTextView = view.findViewById(R.id.uartWaitingTextView);
    RadioGroup colorModeRadioGroup = view.findViewById(R.id.colorModeRadioGroup);
    colorModeRadioGroup.check(mIsColorEnabled ? R.id.colorModeColorButton : R.id.colorModeMonochromeButton);
    colorModeRadioGroup.setOnCheckedChangeListener((radioGroup, i) -> {
        mIsColorEnabled = i == R.id.colorModeColorButton;
        mThermalScaleView.updateGradient();
    });

    RadioGroup magnificationRadioGroup = view.findViewById(R.id.magnificationRadioGroup);
    magnificationRadioGroup.check(mIsFilterEnabled ? R.id.magnificationFilteredButton : R.id.magnificationPixelatedButton);
    magnificationRadioGroup.setOnCheckedChangeListener((radioGroup, i) -> mIsFilterEnabled = i == R.id.magnificationFilteredButton);

    mCameraImageView = view.findViewById(R.id.cameraImageView);
    mLowerTempTextView = view.findViewById(R.id.lowerTempTextView);
    mUpperTempTextView = view.findViewById(R.id.upperTempTextView);
    mThermalScaleView = view.findViewById(R.id.thermalScaleView);
    mThermalScaleView.setThermalCameraFragment(this);

    // Setup
    Context context = getContext();
    if (context != null) {
        mUartDataManager = new UartDataManager(context, this, true);
        setupUart();
    }
}
 

private void initView() {
	ActionBar actionBar = this.getActionBar();
	actionBar.setDisplayShowHomeEnabled(false);
	actionBar.setDisplayShowTitleEnabled(true);
	setOverflowShowingAlways();

	mFragmentManager = getFragmentManager();
	mRg_tab = (RadioGroup) findViewById(R.id.cgt_rg_tab);
	mRg_tab.setOnCheckedChangeListener(this);
}
 

private void initButtonTypeRadioGroup() {
	buttonTypeRadioGroup = (RadioGroup) findViewById(R.id.fab_activity_radiogroup_button_type);
	switch (actionButton.getType()) {
		case DEFAULT:
			buttonTypeRadioGroup.check(R.id.fab_activity_radiobutton_default);
			break;
		case MINI:
			buttonTypeRadioGroup.check(R.id.fab_activity_radiobutton_mini);
			break;
		case BIG:
               buttonTypeRadioGroup.check(R.id.fab_activity_radiobutton_big);
               break;
	}
	buttonTypeRadioGroup.setOnCheckedChangeListener(new ButtonTypeChangeListener());
}
 

private void showAppreciateDialog() {
    AlertDialog.Builder builder = new AlertDialog.Builder(this, R.style.MyDialogTheme);
    builder.setTitle("赞赏作者");
    View view = View.inflate(this, R.layout.layout_appreciate_qrcode, null);
    final ImageView imageViewWebChat = view.findViewById(R.id.iv_appreciate_qr_code_web_chat);
    final ImageView imageViewAliPay = view.findViewById(R.id.iv_appreciate_qr_code_ali_pay);
    final RadioGroup radioGroup = view.findViewById(R.id.rg_pay);
    radioGroup.setOnCheckedChangeListener(new RadioGroup.OnCheckedChangeListener() {
        @Override
        public void onCheckedChanged(RadioGroup group, int checkedId) {
            switch (checkedId) {
                case R.id.rb_web_chat:
                    imageViewWebChat.setVisibility(View.VISIBLE);
                    imageViewAliPay.setVisibility(View.GONE);
                    break;
                case R.id.rb_ali_pay:
                    imageViewWebChat.setVisibility(View.GONE);
                    imageViewAliPay.setVisibility(View.VISIBLE);
                    break;
            }
        }
    });
    builder.setView(view);
    builder.setNegativeButton("算了，囊中羞涩", null);
    builder.setPositiveButton("保存至相册", new DialogInterface.OnClickListener() {
        @Override
        public void onClick(DialogInterface dialog, int which) {
            if (radioGroup.getCheckedRadioButtonId() == R.id.rb_ali_pay) {
                saveToSystemGallery("zhi_fu_bao", R.drawable.alipay1547141972480);
            } else {
                saveToSystemGallery("wei_xin", R.drawable.mm_reward_qrcode_1547141812376);
            }
        }
    });
    builder.show();
}
 

private void initBase() {
    vBase = LayoutInflater.from(this).inflate(R.layout.include_circleprogressbar_base, vgControl,
            false);
    rgGravity1 = vBase.findViewById(R.id.cpb_rg_gravity_1);
    rgGravity1.setOnCheckedChangeListener(this);
    rgGravity2 = vBase.findViewById(R.id.cpb_rg_gravity_2);
    rgGravity2.setOnCheckedChangeListener(this);
    rgGravity3 = vBase.findViewById(R.id.cpb_rg_gravity_3);
    rgGravity3.setOnCheckedChangeListener(this);
    SeekBar sbRadius = vBase.findViewById(R.id.cpb_sb_radius);
    sbRadius.setOnSeekBarChangeListener(this);
    RadioGroup rgScaleType = vBase.findViewById(R.id.cpb_rg_scale_type);
    rgScaleType.setOnCheckedChangeListener(this);
}
 

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
                         Bundle savedInstanceState) {
    // Inflate the layout for this fragment
    View view = inflater.inflate(R.layout.fragment_setting, container, false);
    btn_clean = (Button)view.findViewById(R.id.btn_clean);
    radio_size = (RadioButton) view.findViewById(R.id.radio_size);
    radio_num = (RadioButton) view.findViewById(R.id.radio_num);
    radio_hw = (RadioButton) view.findViewById(R.id.radio_hw);
    radio_sw = (RadioButton) view.findViewById(R.id.radio_sw);
    group_cache = (RadioGroup) view.findViewById(R.id.group_cache);
    group_decode = (RadioGroup) view.findViewById(R.id.group_decode);

    group_cache.setOnCheckedChangeListener(this);
    group_decode.setOnCheckedChangeListener(this);

    settings = getActivity().getSharedPreferences("SETTINGS", Context.MODE_PRIVATE);
    editor = settings.edit();
    choosedecode = settings.getString("choose_decode","信息为空");
    choosecache = settings.getString("choose_cache","信息为空");
    Log.d("decodeaa",choosecache+"  "+choosedecode);

    initSetting(choosecache,choosedecode);

    btn_clean.setOnClickListener(this);

    return view ;
}
 

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_setting);
    RadioGroup rg_taking_clock = (RadioGroup) findViewById(R.id.rg_talking_clock);
    rb_halfhour = (RadioButton) findViewById(R.id.rb_halfhour);
    rb_hours = (RadioButton) findViewById(R.id.rb_hours);
    rb_noreport = (RadioButton) findViewById(R.id.rb_noreport);
    weel_startTime = (WheelView) findViewById(R.id.weel_start_time);
    weel_stopTime = (WheelView) findViewById(R.id.weel_stop_time);

    et_city = (EditText) findViewById(R.id.et_city);
    et_description = (EditText) findViewById(R.id.et_description);
    model = new SharePerferenceModel();
    model.read();

    CheckBox cb_tick = (CheckBox) findViewById(R.id.cb_tick);
    cb_tick.setChecked(model.isTickSound());
    cb_tick.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
        @Override
        public void onCheckedChanged(CompoundButton compoundButton, boolean b) {
            model.setTickSound(b);
        }
    });
    CheckBox cb_trigger_screen = (CheckBox) findViewById(R.id.cb_trigger_screen);
    cb_trigger_screen.setChecked(model.isTriggerScreen());
    cb_trigger_screen.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
        @Override
        public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
            model.setTriggerScreen(isChecked);
        }
    });

    Button btn_uninstall = (Button) findViewById(R.id.btn_uninstall);
    btn_uninstall.setOnClickListener(this);
    Button btn_about = (Button) findViewById(R.id.btn_about);
    btn_about.setOnClickListener(this);


    for (int i = 0; i < 48; i++) {
        int hours = i / 2;
        int minutes = i % 2 * 30;
        String timeString = String.format("%02d:%02d", hours, (minutes + 1));
        listTime[i] = timeString;
    }

    ArrayWheelAdapter<String> timeAdpater = new ArrayWheelAdapter<String>(this, listTime);
    weel_startTime.setViewAdapter(timeAdpater);
    ArrayWheelAdapter<String> durationAdapter = new ArrayWheelAdapter<String>(this, listTime);
    weel_stopTime.setViewAdapter(durationAdapter);
    initData();

    rg_taking_clock.setOnCheckedChangeListener(new RadioGroup.OnCheckedChangeListener() {
        @Override
        public void onCheckedChanged(RadioGroup radioGroup, int index) {
            int checkID = radioGroup.getCheckedRadioButtonId();
            switch (checkID) {
                case R.id.rb_halfhour:
                    model.setTypeHourPower(Constants.TALKING_HALF_AN_HOUR);
                    break;
                case R.id.rb_hours:
                    model.setTypeHourPower(Constants.TALKING_HOURS);
                    break;
                case R.id.rb_noreport:
                    model.setTypeHourPower(Constants.TALKING_NO_REPORT);
                    break;

            }

        }
    });
}
 

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    radioGroup = (RadioGroup) findViewById(R.id.radioGroup);
    radioGroup.clearCheck();

    radioGroup.setOnCheckedChangeListener(new RadioGroup.OnCheckedChangeListener() {
        @Override
        public void onCheckedChanged(RadioGroup group, int checkedId) {
            RadioButton rb = (RadioButton) group.findViewById(checkedId);
            if (null != rb && checkedId > -1) {
                Toast.makeText(MainActivity.this, rb.getText(), Toast.LENGTH_SHORT).show();
            }

        }
    });





}
 

@Override
public void onClick(View v) {
    ScrollView scrollView = new ScrollView(getContext());

    RadioGroup group = new RadioGroup(getContext());
    int vPadding = DimenUtils.dpToPx(12);
    group.setPadding(0, vPadding, 0, vPadding);

    AppCompatRadioButton normalButton = (AppCompatRadioButton) LayoutInflater.from(getContext()).inflate(R.layout.item_dialog_radio_button, group, false);
    normalButton.setId(0);
    normalButton.setText(R.string.font_default);
    normalButton.setChecked(preference == null || preference.length() == 0);
    group.addView(normalButton);

    for (int i = 0; i < items.size(); i++) {
        String item = items.get(i);

        AppCompatRadioButton button = (AppCompatRadioButton) LayoutInflater.from(getContext()).inflate(R.layout.item_dialog_radio_button, group, false);
        button.setId(i + 1);
        button.setText(item.replace(".ttf", ""));
        button.setTag(item);
        try {
            button.setTypeface(Typeface.createFromAsset(getContext().getAssets(), item));
        } catch (Exception e) {
            continue;
        }
        button.setChecked(preference != null && preference.equals(item));
        group.addView(button);
    }

    group.setOnCheckedChangeListener((group1, checkedId) -> {
        for (int i = 0; i < group1.getChildCount(); i++) {
            RadioButton child = (RadioButton) group1.getChildAt(i);
            child.setChecked(child.getId() == checkedId);
            if (child.getId() == checkedId)
                selectedPreference = (String) child.getTag();
        }
    });

    scrollView.addView(group);

    new AlertDialog.Builder(getContext())
            .setTitle(getIdentifier().getTitle())
            .setView(scrollView)
            .setPositiveButton(android.R.string.ok, (dialog, which) -> {
                FontPreferenceData.this.preference = selectedPreference;

                getIdentifier().setPreferenceValue(getContext(), selectedPreference);
                onPreferenceChange(selectedPreference);
                selectedPreference = null;
            })
            .setNegativeButton(android.R.string.cancel, (dialog, which) -> selectedPreference = null)
            .show();
}
 

private void showThemeDialog() {
    ScrollView scrollView = new ScrollView(getActivity());
    RadioGroup radioGroup = new RadioGroup(getActivity());
    scrollView.addView(radioGroup);
    int margin = ScreenUtils.dp2px(16);
    radioGroup.setPadding(margin / 2, margin, margin, margin);

    for (int i = 0; i < themeColorArray.length; i++) {
        AppCompatRadioButton arb = new AppCompatRadioButton(getActivity());

        RadioGroup.LayoutParams params =
                new RadioGroup.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT,
                        ViewGroup.LayoutParams.WRAP_CONTENT);

        arb.setLayoutParams(params);
        arb.setId(i);
        arb.setTextColor(getResources().getColor(themeColorArray[i]));
        arb.setText(themeNameArray[i]);
        arb.setTextSize(16);
        arb.setPadding(0, margin / 2, 0, margin / 2);
        radioGroup.addView(arb);
    }

    radioGroup.setOnCheckedChangeListener(new RadioGroup.OnCheckedChangeListener() {
        @Override
        public void onCheckedChanged(RadioGroup group, int checkedId) {
            theme = checkedId;
        }
    });

    DialogHelper dialogHelper = new DialogHelper();
    dialogHelper.showCustomDialog(getActivity(), scrollView,
            getString(R.string.theme_preference), new DialogListener() {
                @Override
                public void onPositive(DialogInterface dialog, int which) {
                    super.onPositive(dialog, which);
                    dialog.dismiss();
                    String key = getString(R.string.app_preference_theme);
                    int oldTheme = Preferences.getInt(key, 0);

                    if (theme != oldTheme) {
                        Preferences.putInt(key, theme);
                        ActivityUtil.finishAll();
                        startActivity(new Intent(app.mContext, CourseActivity.class));
                    }
                }
            });
}
 

@Override
public Dialog onCreateDialog(Bundle savedInstanceState) {
	Context context = getActivity();
	qualityForm = new SeekBarForm(false);
	qualityForm.setConfiguration(1, 100, 1, 1);
	qualityForm.setValueFormat(getString(R.string.text_quality_format));
	qualityForm.setCurrentValue(savedInstanceState != null ? savedInstanceState.getInt(EXTRA_QUALITY) : 100);
	reduceForm = new SeekBarForm(false);
	reduceForm.setConfiguration(1, 8, 1, 1);
	reduceForm.setValueFormat(getString(R.string.text_reduce_format));
	reduceForm.setCurrentValue(savedInstanceState != null ? savedInstanceState.getInt(EXTRA_REDUCE) : 1);
	int padding = getResources().getDimensionPixelSize(R.dimen.dialog_padding_view);
	View qualityView = qualityForm.inflate(context);
	qualityForm.getSeekBar().setSaveEnabled(false);
	qualityView.setPadding(qualityView.getPaddingLeft(), 0, qualityView.getPaddingRight(), padding / 2);
	View reduceView = reduceForm.inflate(context);
	reduceForm.getSeekBar().setSaveEnabled(false);
	reduceView.setPadding(reduceView.getPaddingLeft(), 0, reduceView.getPaddingRight(),
			reduceView.getPaddingBottom());
	radioGroup = new RadioGroup(context);
	radioGroup.setOrientation(RadioGroup.VERTICAL);
	radioGroup.setPadding(padding, padding, padding, padding / 2);
	radioGroup.setOnCheckedChangeListener(this);
	for (int i = 0; i < OPTIONS.length; i++) {
		RadioButton radioButton = new RadioButton(context);
		radioButton.setText(OPTIONS[i]);
		radioButton.setId(IDS[i]);
		radioGroup.addView(radioButton);
	}
	radioGroup.check(IDS[0]);
	LinearLayout linearLayout = new LinearLayout(context);
	linearLayout.setOrientation(LinearLayout.VERTICAL);
	FrameLayout qualityLayout = new FrameLayout(context);
	qualityLayout.setId(android.R.id.text1);
	qualityLayout.addView(qualityView);
	FrameLayout reduceLayout = new FrameLayout(context);
	reduceLayout.setId(android.R.id.text2);
	reduceLayout.addView(reduceView);
	linearLayout.addView(radioGroup, LinearLayout.LayoutParams.MATCH_PARENT,
			LinearLayout.LayoutParams.WRAP_CONTENT);
	linearLayout.addView(qualityLayout, LinearLayout.LayoutParams.MATCH_PARENT,
			LinearLayout.LayoutParams.WRAP_CONTENT);
	linearLayout.addView(reduceLayout, LinearLayout.LayoutParams.MATCH_PARENT,
			LinearLayout.LayoutParams.WRAP_CONTENT);
	ScrollView scrollView = new ScrollView(context);
	scrollView.addView(linearLayout, ScrollView.LayoutParams.MATCH_PARENT,
			ScrollView.LayoutParams.WRAP_CONTENT);
	return new AlertDialog.Builder(context).setTitle(R.string.text_reencode_image)
			.setView(scrollView).setNegativeButton(android.R.string.cancel, null)
			.setPositiveButton(android.R.string.ok, this).create();
}
 

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    Log.i("GCS", "onCreate");

    mRadioGroup = (RadioGroup) findViewById(R.id.orientation_type);
    mRadioGroup.setOnCheckedChangeListener(this);

    mPageTotal = (TextView) findViewById(R.id.page_total);
    mPageCurrent = (TextView) findViewById(R.id.page_current);

    mLayoutManager = new PagerGridLayoutManager(mRows, mColumns, PagerGridLayoutManager
            .HORIZONTAL);


    // 系统带的 RecyclerView，无需自定义
    mRecyclerView = (RecyclerView) findViewById(R.id.recycler_view);

    // 水平分页布局管理器
    mLayoutManager.setPageListener(this);    // 设置页面变化监听器
    mRecyclerView.setLayoutManager(mLayoutManager);

    // 设置滚动辅助工具
    PagerGridSnapHelper pageSnapHelper = new PagerGridSnapHelper();
    pageSnapHelper.attachToRecyclerView(mRecyclerView);

    // 如果需要查看调试日志可以设置为true，一般情况忽略即可
    PagerConfig.setShowLog(true);

    // 使用原生的 Adapter 即可
    mAdapter = new MyAdapter();
    mAdapter.registerAdapterDataObserver(new RecyclerView.AdapterDataObserver() {
        @Override public void onChanged() {
            super.onChanged();
            int count = mAdapter.getItemCount();

        }
    });
    mRecyclerView.setAdapter(mAdapter);
}
 

private void setupOptions() {
    // Enable or disable the previews
    SwitchCompat previewSwitch = findViewById(R.id.previewEnabledSwitch);
    previewSwitch.setOnCheckedChangeListener(
            (buttonView, isChecked) -> {
                previewTimeBar.setPreviewEnabled(isChecked);
                previewSeekBar.setPreviewEnabled(isChecked);
            }
    );

    // Enable or disable auto-hide mode of previews
    SwitchCompat previewAutoHideSwitch = findViewById(R.id.previewAutoHideSwitch);
    previewAutoHideSwitch.setOnCheckedChangeListener(
            (buttonView, isChecked) -> {
                exoPlayerManager.setResumeVideoOnPreviewStop(isChecked);
                previewTimeBar.setAutoHidePreview(isChecked);
                previewSeekBar.setAutoHidePreview(isChecked);
            }
    );

    // Change the animations
    RadioGroup animationRadioGroup = findViewById(R.id.previewAnimationRadioGroup);
    animationRadioGroup.setOnCheckedChangeListener((group, checkedId) -> {
        if (checkedId == R.id.noAnimationRadioButton) {
            previewTimeBar.setPreviewAnimationEnabled(false);
            previewSeekBar.setPreviewAnimationEnabled(false);
        } else {
            previewTimeBar.setPreviewAnimationEnabled(true);
            previewSeekBar.setPreviewAnimationEnabled(true);
            if (checkedId == R.id.fadeAnimationRadioButton) {
                previewTimeBar.setPreviewAnimator(new PreviewFadeAnimator());
                previewSeekBar.setPreviewAnimator(new PreviewFadeAnimator());
            } else if (Build.VERSION.SDK_INT >= 21) {
                previewTimeBar.setPreviewAnimator(new PreviewMorphAnimator());
                previewSeekBar.setPreviewAnimator(new PreviewMorphAnimator());
            }
        }
    });

    // Toggle previews
    Button toggleButton = findViewById(R.id.previewToggleButton);
    toggleButton.setOnClickListener(v -> {
        if (previewTimeBar.isShowingPreview()) {
            previewTimeBar.hidePreview();
        } else {
            previewTimeBar.showPreview();
            exoPlayerManager.loadPreview(previewTimeBar.getProgress(),
                    previewTimeBar.getMax());
        }
        if (previewSeekBar.isShowingPreview()) {
            previewSeekBar.hidePreview();
        } else {
            previewSeekBar.showPreview();
        }
    });

    // Change colors
    Button changeColorsButton = findViewById(R.id.previewToggleColors);
    changeColorsButton.setOnClickListener(v -> {
        final int seekBarColor = previewSeekBar.getScrubberColor();
        final int timeBarColor = previewTimeBar.getScrubberColor();
        previewSeekBar.setPreviewThumbTint(timeBarColor);
        previewSeekBar.setProgressTint(timeBarColor);
        previewTimeBar.setPreviewThumbTint(seekBarColor);
        previewTimeBar.setPlayedColor(seekBarColor);
    });

}