Java Code Examples for android.app.Activity#getSystemService()

public static boolean enqueDownload(final Activity c){
	if (ContextCompat.checkSelfPermission(c,
			Manifest.permission.WRITE_EXTERNAL_STORAGE) == PackageManager.PERMISSION_GRANTED) {

		DownloadManager manager
				= (DownloadManager) c.getSystemService(Context.DOWNLOAD_SERVICE);

		if (manager != null) {
			c.runOnUiThread(new Runnable() {
				@Override
				public void run() {
					Tools.toastString(R.string.download_started, c);
				}
			});

			manager.enqueue(request);
		}

		return true;
	}else
		return false;

}
 

/**
 * You should initialize your BobHelper in or after onCreate() of activity.
 * @param activity - The activity that this BobHelper is tied to.
 */
@SuppressLint("NewApi")
public BobHelper(Activity activity) {
	this.activity = activity;

	wm = (WindowManager) activity.getSystemService(Context.WINDOW_SERVICE);
	size = new Point();

	try {                                                   // Get screen dimensions
		wm.getDefaultDisplay().getRealSize(size);           // New method, might not work on old devices
		screenWidth = size.x;
		screenHeight = size.y;
	} catch (NoSuchMethodError er) {                        // If new method didn't work, use depreciated methods
		screenWidth = wm.getDefaultDisplay().getWidth();
		screenHeight = wm.getDefaultDisplay().getHeight();
	}

	ActivityManager am = (ActivityManager) activity.getSystemService(Context.ACTIVITY_SERVICE);
	Log.i("info", Integer.toString(am.getMemoryClass()) + "MB ram available.");
}
 

@ReactMethod
public void startLockTask() {
  try {
    Activity mActivity = reactContext.getCurrentActivity();
    if (mActivity != null) {
      DevicePolicyManager myDevicePolicyManager = (DevicePolicyManager) mActivity.getSystemService(Context.DEVICE_POLICY_SERVICE);
      ComponentName mDPM = new ComponentName(mActivity, MyAdmin.class);

      if (myDevicePolicyManager.isDeviceOwnerApp(mActivity.getPackageName())) {
        String[] packages = {mActivity.getPackageName()};
        myDevicePolicyManager.setLockTaskPackages(mDPM, packages);
        mActivity.startLockTask();
      } else {
        mActivity.startLockTask();
      }
    }
  } catch (Exception e) {
  }
}
 

/**
 * Show the activity over the lock-screen and wake up the device. If you launched the app manually
 * both of these conditions are already true. If you deployed from the IDE, however, this will
 * save you from hundreds of power button presses and pattern swiping per day!
 */
public static void riseAndShine(Activity activity) {
  activity.getWindow().addFlags(FLAG_SHOW_WHEN_LOCKED);

  PowerManager power = (PowerManager) activity.getSystemService(POWER_SERVICE);
  PowerManager.WakeLock lock =
      power.newWakeLock(FULL_WAKE_LOCK | ACQUIRE_CAUSES_WAKEUP | ON_AFTER_RELEASE, "wakeup!");
  lock.acquire();
  lock.release();
}
 

public static boolean hideSoftInput(Activity activity) {
    if (activity.getCurrentFocus() != null) {
        InputMethodManager imm = (InputMethodManager) activity.getSystemService(Context.INPUT_METHOD_SERVICE);
        return imm.hideSoftInputFromWindow(activity.getCurrentFocus().getWindowToken(), 0);
    }
    return false;
}
 

public static void hideSoftKeyboard(Activity activity)
{
	InputMethodManager inputMethodManager = (InputMethodManager) activity.getSystemService(Activity.INPUT_METHOD_SERVICE);
	View view = activity.getCurrentFocus();
	if (view != null)
		inputMethodManager.hideSoftInputFromWindow(view.getWindowToken(), 0);
}
 

public static void hideKeyboard(final Activity activity) {
    try {
        final EditText editText = (EditText) activity.getCurrentFocus();
        final InputMethodManager imm = (InputMethodManager) activity.getSystemService(
            Context.INPUT_METHOD_SERVICE);
        imm.hideSoftInputFromWindow(editText.getWindowToken(), 0);
    } catch (final Exception ex) { }
}
 

/**
 * 关闭软键盘
 */
public static void closeSoftKeyboard(Activity activity) {
    //隐藏软键盘
    View view = activity.getWindow().peekDecorView();
    if (view != null) {
        InputMethodManager inputManager = (InputMethodManager) activity.getSystemService(Context.INPUT_METHOD_SERVICE);
        inputManager.hideSoftInputFromWindow(view.getWindowToken(), 0);
    }
}
 

/**
 * Unhides the AppRestrictionSchema sample in case it is hidden in this profile.
 *
 * @param activity The activity
 */
private void unhideApp(Activity activity) {
    DevicePolicyManager devicePolicyManager =
            (DevicePolicyManager) activity.getSystemService(Activity.DEVICE_POLICY_SERVICE);
    devicePolicyManager.setApplicationHidden(
            EnforcerDeviceAdminReceiver.getComponentName(activity),
            Constants.PACKAGE_NAME_APP_RESTRICTION_SCHEMA, false);
    Toast.makeText(activity, "Enabled the app", Toast.LENGTH_SHORT).show();
    mListener.onStatusUpdated();
}
 

/**
 * Show the activity over the lock-screen and wake up the device. If you launched the app manually
 * both of these conditions are already true. If you deployed from the IDE, however, this will
 * save you from hundreds of power button presses and pattern swiping per day!
 */
private static void riseAndShine(Activity activity) {
	activity.getWindow().addFlags(FLAG_SHOW_WHEN_LOCKED);

	PowerManager power = (PowerManager) activity.getSystemService(POWER_SERVICE);
	PowerManager.WakeLock lock =
			power.newWakeLock(FULL_WAKE_LOCK | ACQUIRE_CAUSES_WAKEUP | ON_AFTER_RELEASE, "wakeup!");
	lock.acquire();
	lock.release();
}
 

@Override
void closeInputMethod() {
    Activity activity = getSource();
    View focusView = activity.getCurrentFocus();
    if (focusView != null) {
        InputMethodManager manager = (InputMethodManager) activity.getSystemService(Context.INPUT_METHOD_SERVICE);
        manager.hideSoftInputFromWindow(focusView.getWindowToken(), 0);
    }
}
 

public static void closeSoftKeyboard(Activity activity) {
    //隐藏软键盘
    View view = activity.getWindow().peekDecorView();
    if (view != null) {
        InputMethodManager inputMethodManager = (InputMethodManager) activity.getSystemService(Context
                .INPUT_METHOD_SERVICE);
        inputMethodManager.hideSoftInputFromWindow(view.getWindowToken(), 0);
    }
}
 

public Audio(Activity activity, MediaPlayer player, InputStream stream, Runnable onComplete) {
    this.activity = activity;
    this.player = player;
    this.stream = stream;
    if (onComplete != null) {
        addCompletionHandler(onComplete);
    }
    
    bindPlayerCleanupOnComplete();

    AudioManager audioManager = (AudioManager) activity.getSystemService(Context.AUDIO_SERVICE);
    int result = audioManager.requestAudioFocus(this, AudioManager.STREAM_MUSIC,
            AudioManager.AUDIOFOCUS_GAIN);
}
 

public static void hideSoftKeyboard(Activity a) {
    InputMethodManager inputMethodManager = (InputMethodManager) a
            .getSystemService(Activity.INPUT_METHOD_SERVICE);
    if (a.getCurrentFocus() != null
            && a.getCurrentFocus().getWindowToken() != null)
        inputMethodManager.hideSoftInputFromWindow(a.getCurrentFocus().getWindowToken(), 0);
}
 

public static void closeSoftKeyboard(Activity activity) {

        View currentFocusView = activity.getCurrentFocus();
        if (currentFocusView != null) {
            InputMethodManager imm = (InputMethodManager) activity.getSystemService(Context.INPUT_METHOD_SERVICE);
            imm.hideSoftInputFromWindow(currentFocusView.getWindowToken(), 0);
        }
    }
 

/**
 * Show the activity over the lockscreen and wake up the device. If you launched the app
 * manually both of these conditions are already true. If you deployed from the IDE, however,
 * this will save you from hundreds of power button presses and pattern swiping per day!
 */
public static void riseAndShine(Activity activity) {
    activity.getWindow().addFlags(WindowManager.LayoutParams.FLAG_SHOW_WHEN_LOCKED);

    PowerManager power = (PowerManager) activity.getSystemService(Context.POWER_SERVICE);
    PowerManager.WakeLock lock = power.newWakeLock(PowerManager.FULL_WAKE_LOCK | PowerManager.ACQUIRE_CAUSES_WAKEUP | PowerManager.ON_AFTER_RELEASE, "wakeup!");

    lock.acquire(100000);
    lock.release();
}
 

/**
 * 隐藏软键盘
 * @param activity
 */
public static void hideKeyboard(Activity activity) {
	if(activity != null){
		InputMethodManager imm = (InputMethodManager) activity.getSystemService(Context.INPUT_METHOD_SERVICE);
		if(imm.isActive()){
			imm.hideSoftInputFromWindow(activity.getCurrentFocus().getWindowToken(), 0);
		}
	}
}
 

@SuppressLint("InflateParams")
public MorePopWindow(final Activity context) {
    LayoutInflater inflater = (LayoutInflater) context
            .getSystemService(Context.LAYOUT_INFLATER_SERVICE);
    conentView = inflater.inflate(R.layout.popupwindow_more, null);
 
    // 设置SelectPicPopupWindow的View
    this.setContentView(conentView);
    // 设置SelectPicPopupWindow弹出窗体的宽
    this.setWidth(LayoutParams.WRAP_CONTENT);
    // 设置SelectPicPopupWindow弹出窗体的高
    this.setHeight(LayoutParams.WRAP_CONTENT);
    // 设置SelectPicPopupWindow弹出窗体可点击
    this.setFocusable(true);
    this.setOutsideTouchable(true);
    // 刷新状态
    this.update();
    // 实例化一个ColorDrawable颜色为半透明
    ColorDrawable dw = new ColorDrawable(0000000000);
    // 点back键和其他地方使其消失,设置了这个才能触发OnDismisslistener ，设置其他控件变化等操作
    this.setBackgroundDrawable(dw);
    
    // 设置SelectPicPopupWindow弹出窗体动画效果
    this.setAnimationStyle(R.style.AnimationPreview);
    
    
    RelativeLayout   re_record =(RelativeLayout) conentView.findViewById(R.id.re_record);
     
    re_record.setOnClickListener(new OnClickListener(){

        @Override
        public void onClick(View v) {
            context.startActivity(new Intent(context,RecordsActivity.class));  
            MorePopWindow.this.dismiss();
      
        }
        
    } );
    
    
 
}
 

/**
 * 获取手机基站运行商
 */
public static String getTelephonyNetWorkOperator(Activity activity) {
    TelephonyManager telephonyManager = (TelephonyManager) activity.getSystemService(Context.TELEPHONY_SERVICE);
    return telephonyManager.getNetworkOperator();
}
 

public static boolean isActive(Activity activity) {
	InputMethodManager imm = (InputMethodManager) activity.getSystemService(Context.INPUT_METHOD_SERVICE);
	return imm.isActive();
}