1.AndroidManifest 文件注册Service
<service android:name=".service.ViewService"/>
2.调用启动service
Intent intent = new Intent(MainActivity.this, ViewService.class);
startService(intent);// 启动服务
public class MainActivity extends AppCompatActivity {
public static int OVERLAY_PERMISSION_REQ_CODE = 1234;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
requestDrawOverLays();
}
/**
* 权限引导
*/
@TargetApi(Build.VERSION_CODES.M)
public void requestDrawOverLays() {
if (!Settings.canDrawOverlays(MainActivity.this)) {
Toast.makeText(this, "can not DrawOverlays", Toast.LENGTH_SHORT).show();
Intent intent = new Intent(Settings.ACTION_MANAGE_OVERLAY_PERMISSION, Uri.parse("package:" + MainActivity.this.getPackageName()));
startActivityForResult(intent, OVERLAY_PERMISSION_REQ_CODE);
} else {
Intent intent = new Intent(MainActivity.this, ViewService.class);
startService(intent);// 启动服务
}
}
@TargetApi(Build.VERSION_CODES.M)
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
if (requestCode == OVERLAY_PERMISSION_REQ_CODE) {
if (!Settings.canDrawOverlays(this)) {
// SYSTEM_ALERT_WINDOW permission not granted...
Toast.makeText(this, "Permission Denieddd by user.Please Check it in Settings", Toast.LENGTH_SHORT).show();
} else {
Intent intent = new Intent(MainActivity.this, ViewService.class);
startService(intent);// 启动服务
}
}
}
}
- 窗体悬浮服务 ViewService
/**
* 窗体悬浮服务 类
*/
public class ViewService extends Service {
private WindowManager windowManager;
private Button button;
@Override
public IBinder onBind(Intent intent) {
return null;
}
@Override
public void onCreate() {
super.onCreate();
showOver();
}
@Override
public void onDestroy() {
super.onDestroy();
windowManager.removeView(button);
}
private void showOver() {
FloatWindow floatWindow = new FloatWindow(this);
floatWindow.setLayout(R.layout.fl);
floatWindow.show();
}
}
- 悬浮窗View
import android.annotation.SuppressLint;
import android.content.Context;
import android.graphics.PixelFormat;
import android.os.Build;
import android.view.Gravity;
import android.view.LayoutInflater;
import android.view.MotionEvent;
import android.view.View;
import android.view.WindowManager;
@SuppressLint("ClickableViewAccessibility")
public class FloatWindow extends View {
private final static String TAG = "FloatWindow";
private Context mContext; // 声明一个上下文对象
private WindowManager wm; // 声明一个窗口管理器对象
private static WindowManager.LayoutParams wmParams;
public View mContentView; // 声明一个内容视图对象
private float mScreenX, mScreenY; // 触摸点在屏幕上的横纵坐标
private float mLastX, mLastY; // 上次触摸点的横纵坐标
private float mDownX, mDownY; // 按下点的横纵坐标
private boolean isShowing = false; // 是否正在显示
public FloatWindow(Context context) {
super(context);
// 从系统服务中获取窗口管理器，后续将通过该管理器添加悬浮窗
wm = (WindowManager) context.getSystemService(Context.WINDOW_SERVICE);
if (wmParams == null) {
wmParams = new WindowManager.LayoutParams();
}
mContext = context;
}
// 设置悬浮窗的内容布局
public void setLayout(int layoutId) {
// 从指定资源编号的布局文件中获取内容视图对象
mContentView = LayoutInflater.from(mContext).inflate(layoutId, null);
// 接管悬浮窗的触摸事件，使之即可随手势拖动，又可处理点击动作
mContentView.setOnTouchListener(new OnTouchListener() {
// 在发生触摸事件时触发
public boolean onTouch(View v, MotionEvent event) {
mScreenX = event.getRawX();
mScreenY = event.getRawY();
switch (event.getAction()) {
case MotionEvent.ACTION_DOWN: // 手指按下
mDownX = mScreenX;
mDownY = mScreenY;
break;
case MotionEvent.ACTION_MOVE: // 手指移动
updateViewPosition(); // 更新视图的位置
break;
case MotionEvent.ACTION_UP: // 手指松开
updateViewPosition(); // 更新视图的位置
// 响应悬浮窗的点击事件
if (Math.abs(mScreenX - mDownX) < 3
&& Math.abs(mScreenY - mDownY) < 3) {
if (mListener != null) {
mListener.onFloatClick(v);
}
}
break;
}
mLastX = mScreenX;
mLastY = mScreenY;
return true;
}
});
}
// 更新悬浮窗的视图位置
private void updateViewPosition() {
// 此处不能直接转为整型，因为小数部分会被截掉，重复多次后就会造成偏移越来越大
wmParams.x = Math.round(wmParams.x + mScreenX - mLastX);
wmParams.y = Math.round(wmParams.y + mScreenY - mLastY);
// 通过窗口管理器更新内容视图的布局参数
wm.updateViewLayout(mContentView, wmParams);
}
// 显示悬浮窗
public void show() {
if (mContentView != null) {
// 设置为TYPE_SYSTEM_ALERT类型，才能悬浮在其它页面之上
if (Build.VERSION.SDK_INT < Build.VERSION_CODES.O) {
// 注意TYPE_SYSTEM_ALERT从Android8.0开始被舍弃了
wmParams.type = WindowManager.LayoutParams.TYPE_SYSTEM_ALERT;
} else {
// 从Android8.0开始悬浮窗要使用TYPE_APPLICATION_OVERLAY
wmParams.type = WindowManager.LayoutParams.TYPE_APPLICATION_OVERLAY;
}
wmParams.format = PixelFormat.RGBA_8888;
wmParams.flags = WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE;
wmParams.alpha = 1.0f; // 1.0为完全不透明，0.0为完全透明
// 对齐方式为靠左且靠上，因此悬浮窗的初始位置在屏幕的左上角
wmParams.gravity = Gravity.LEFT | Gravity.TOP;
wmParams.x = 0;
wmParams.y = 0;
// 设置悬浮窗的宽度和高度为自适应
wmParams.width = WindowManager.LayoutParams.WRAP_CONTENT;
wmParams.height = WindowManager.LayoutParams.WRAP_CONTENT;
// 添加自定义的窗口布局，然后屏幕上就能看到悬浮窗了
wm.addView(mContentView, wmParams);
isShowing = true;
}
}
// 关闭悬浮窗
public void close() {
if (mContentView != null) {
// 移除自定义的窗口布局
wm.removeView(mContentView);
isShowing = false;
}
}
// 判断悬浮窗是否打开
public boolean isShow() {
return isShowing;
}
private FloatClickListener mListener; // 声明一个悬浮窗的点击监听器对象
// 设置悬浮窗的点击监听器
public void setOnFloatListener(FloatClickListener listener) {
mListener = listener;
}
// 定义一个悬浮窗的点击监听器接口，用于触发点击行为
public interface FloatClickListener {
void onFloatClick(View v);
}
}
