我已经在我的应用程序中使用了以下方法,其中我想在启动时显示Dialer应用程序的顶部视图(类似于Truecaller中的内容).为此,创建一个广播接收器,它有助于接受所描述的各种设备事件下面.

广播接收器：

private WindowManager wm;

private static LinearLayout ly1;

private WindowManager.LayoutParams params1;

// onReceive function of the Broadcast Receiver

public void onReceive(Context arg0, Intent arg1) {

String state = arg1.getStringExtra(TelephonyManager.EXTRA_STATE);

// Adds a view on top of the dialer app when it launches.

if(state.equals(TelephonyManager.EXTRA_STATE_OFFHOOK)){

wm = (WindowManager) context.getSystemService(Context.WINDOW_SERVICE);

params1 = new WindowManager.LayoutParams(

LayoutParams.MATCH_PARENT,

LayoutParams.MATCH_PARENT, WindowManager.LayoutParams.TYPE_SYSTEM_ALERT |

WindowManager.LayoutParams.TYPE_SYSTEM_OVERLAY,

WindowManager.LayoutParams.FLAG_NOT_TOUCH_MODAL |

WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE,

PixelFormat.TRANSPARENT);

params1.height = 75;

params1.width = 512;

params1.x = 265;

params1.y = 400;

params1.format = PixelFormat.TRANSLUCENT;

ly1 = new LinearLayout(context);

ly1.setBackgroundColor(Color.BLACK);

ly1.setOrientation(LinearLayout.VERTICAL);

wm.addView(ly1, params1);

}

// To remove the view once the dialer app is closed.

if(arg1.getAction().equals("android.intent.action.PHONE_STATE")){

String state = arg1.getStringExtra(TelephonyManager.EXTRA_STATE);

if(state.equals(TelephonyManager.EXTRA_STATE_IDLE)){

WindowManager wm = (WindowManager) context.getSystemService(Context.WINDOW_SERVICE);

if(ly1!=null)

{

wm.removeView(ly1);

ly1 = null;

}

}

}

}

PS：以上例如生成了具有黑色背景的布局的视图,具有如上所示的尺寸.您可以自由地在该视图中添加任何布局.例如：要在视图中包括布局,您可以将上述代码修改为包括以下这些：

ly1 = new LinearLayout(getApplicationContext());

ly1.setOrientation(LinearLayout.HORIZONTAL);

View hiddenInfo = getLayoutInflater().inflate(R.layout.layout1, ly1, false);

ly1.addView(hiddenInfo);

wm.addView(ly1, params1);

PS：Layout1是您需要在布局文件夹中创建并在此处引用它的布局.

?另外,在清单中,您需要包含以下权限.

(within intent filter of Broadcast Receiver)