这是我的工作代码。当需要显示浮动视图时,您将启动此服务。
浮动服务类
import android.app.Service;
import android.content.Intent;
import android.graphics.PixelFormat;
import android.os.Build;
import android.os.IBinder;
import android.view.Gravity;
import android.view.LayoutInflater;
import android.view.MotionEvent;
import android.view.View;
import android.view.WindowManager;
import android.widget.ImageView;
import android.widget.Toast;
public class FloatingService extends Service {
private WindowManager mWindowManager;
private View mFloatingView;
public FloatingService() {
}
@Override
public IBinder onBind(Intent intent) {
return null;
}
@Override
public void onCreate() {
super.onCreate();
//Inflate the floating view layout we created
mFloatingView = LayoutInflater.from(this).inflate(R.layout.layout_floating_widget, null);
int LAYOUT_FLAG;
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
LAYOUT_FLAG = WindowManager.LayoutParams.TYPE_APPLICATION_OVERLAY;
} else {
LAYOUT_FLAG = WindowManager.LayoutParams.TYPE_PHONE;
}
//Add the view to the window.
final WindowManager.LayoutParams params = new WindowManager.LayoutParams(
WindowManager.LayoutParams.WRAP_CONTENT,
WindowManager.LayoutParams.WRAP_CONTENT,
LAYOUT_FLAG,
WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE,
PixelFormat.TRANSLUCENT);
//Specify the view position
params.gravity = Gravity.TOP | Gravity.LEFT; //Initially view will be added to top-left corner
params.x = 0;
params.y = 100;
//Add the view to the window
mWindowManager = (WindowManager) getSystemService(WINDOW_SERVICE);
mWindowManager.addView(mFloatingView, params);
//The root element of the collapsed view layout
final View collapsedView = mFloatingView.findViewById(R.id.collapse_view);
//The root element of the expanded view layout
final View expandedView = mFloatingView.findViewById(R.id.expanded_container);
//Set the close button
ImageView closeButtonCollapsed = (ImageView) mFloatingView.findViewById(R.id.close_btn);
closeButtonCollapsed.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
//close the service and remove the from from the window
stopSelf();
}
});
//Set the view while floating view is expanded.
//Set the play button.
ImageView playButton = (ImageView) mFloatingView.findViewById(R.id.play_btn);
playButton.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Toast.makeText(FloatingService.this, "Playing the song.", Toast.LENGTH_LONG).show();
}
});
//Set the next button.
ImageView nextButton = (ImageView) mFloatingView.findViewById(R.id.next_btn);
nextButton.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Toast.makeText(FloatingService.this, "Playing next song.", Toast.LENGTH_LONG).show();
}
});
//Set the pause button.
ImageView prevButton = (ImageView) mFloatingView.findViewById(R.id.prev_btn);
prevButton.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Toast.makeText(FloatingService.this, "Playing previous song.", Toast.LENGTH_LONG).show();
}
});
//Set the close button
ImageView closeButton = (ImageView) mFloatingView.findViewById(R.id.close_button);
closeButton.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
collapsedView.setVisibility(View.VISIBLE);
expandedView.setVisibility(View.GONE);
}
});
//Open the application on thi button click
ImageView openButton = (ImageView) mFloatingView.findViewById(R.id.open_button);
openButton.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
//Open the application click.
Intent intent = new Intent(FloatingService.this, MainActivity.class);
intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
startActivity(intent);
//close the service and remove view from the view hierarchy
stopSelf();
}
});
//Drag and move floating view using user's touch action.
mFloatingView.findViewById(R.id.root_container).setOnTouchListener(new View.OnTouchListener() {
private int initialX;
private int initialY;
private float initialTouchX;
private float initialTouchY;
@Override
public boolean onTouch(View v, MotionEvent event) {
switch (event.getAction()) {
case MotionEvent.ACTION_DOWN:
//remember the initial position.
initialX = params.x;
initialY = params.y;
//get the touch location
initialTouchX = event.getRawX();
initialTouchY = event.getRawY();
return true;
case MotionEvent.ACTION_UP:
int Xdiff = (int) (event.getRawX() - initialTouchX);
int Ydiff = (int) (event.getRawY() - initialTouchY);
//The check for Xdiff <10 && YDiff< 10 because sometime elements moves a little while clicking.
//So that is click event.
if (Xdiff < 10 && Ydiff < 10) {
if (isViewCollapsed()) {
//When user clicks on the image view of the collapsed layout,
//visibility of the collapsed layout will be changed to "View.GONE"
//and expanded view will become visible.
collapsedView.setVisibility(View.GONE);
expandedView.setVisibility(View.VISIBLE);
}
}
return true;
case MotionEvent.ACTION_MOVE:
//Calculate the X and Y coordinates of the view.
params.x = initialX + (int) (event.getRawX() - initialTouchX);
params.y = initialY + (int) (event.getRawY() - initialTouchY);
//Update the layout with new X & Y coordinate
mWindowManager.updateViewLayout(mFloatingView, params);
return true;
}
return false;
}
});
}
/**
* Detect if the floating view is collapsed or expanded.
*
* @return true if the floating view is collapsed.
*/
private boolean isViewCollapsed() {
return mFloatingView == null || mFloatingView.findViewById(R.id.collapse_view).getVisibility() == View.VISIBLE;
}
@Override
public void onDestroy() {
super.onDestroy();
if (mFloatingView != null) mWindowManager.removeView(mFloatingView);
}
}
然后添加
<service
android:name="yourpakcage.FloatingService"
android:enabled="true"
android:exported="false"/>
布局浮动小部件.xml
<?xml version="1.0" encoding="utf-8"?>
<FrameLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="wrap_content"
android:layout_height="wrap_content">
<!--Root container-->
<RelativeLayout
android:id="@+id/root_container"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
tools:ignore="UselessParent">
<!--View while view is collapsed-->
<RelativeLayout
android:id="@+id/collapse_view"
android:layout_width="wrap_content"
android:visibility="visible"
android:layout_height="wrap_content"
android:orientation="vertical">
<!--Icon of floating widget -->
<ImageView
android:id="@+id/collapsed_iv"
android:layout_width="60dp"
android:layout_height="60dp"
android:layout_marginTop="8dp"
android:src="@drawable/ic_android_circle"
tools:ignore="ContentDescription"/>
<!--Close button-->
<ImageView
android:id="@+id/close_btn"
android:layout_width="20dp"
android:layout_height="20dp"
android:layout_marginLeft="40dp"
android:src="@drawable/ic_close"
tools:ignore="ContentDescription"/>
</RelativeLayout>
<!--View while view is expanded-->
<LinearLayout
android:id="@+id/expanded_container"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:background="#F8BBD0"
android:visibility="gone"
android:orientation="horizontal"
android:padding="8dp">
<!--Album image for the song currently playing.-->
<ImageView
android:layout_width="80dp"
android:layout_height="80dp"
android:src="@drawable/music_player"
tools:ignore="ContentDescription"/>
<!--Previous button-->
<ImageView
android:id="@+id/prev_btn"
android:layout_width="30dp"
android:layout_height="30dp"
android:layout_gravity="center_vertical"
android:layout_marginLeft="20dp"
android:src="@mipmap/ic_previous"
tools:ignore="ContentDescription"/>
<!--Play button-->
<ImageView
android:id="@+id/play_btn"
android:layout_width="50dp"
android:layout_height="50dp"
android:layout_gravity="center_vertical"
android:layout_marginLeft="10dp"
android:src="@mipmap/ic_play"
tools:ignore="ContentDescription"/>
<!--Next button-->
<ImageView
android:id="@+id/next_btn"
android:layout_width="30dp"
android:layout_height="30dp"
android:layout_gravity="center_vertical"
android:layout_marginLeft="10dp"
android:src="@mipmap/ic_play_next"
tools:ignore="ContentDescription"/>
<RelativeLayout
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:orientation="vertical">
<ImageView
android:id="@+id/close_button"
android:layout_width="20dp"
android:layout_height="20dp"
android:src="@drawable/ic_close"/>
<ImageView
android:id="@+id/open_button"
android:layout_width="20dp"
android:layout_height="20dp"
android:layout_alignParentBottom="true"
android:src="@drawable/ic_open"/>
</RelativeLayout>
</LinearLayout>
</RelativeLayout>
</FrameLayout>
请添加虚拟抽屉和绳子。
以显示浮动视图。
startService(new Intent(passContext, FloatingViewService.class));
