内容简介：原本我是想在BaseActivity的DecorView层添加一个View，奈何之前同事的Activity继承的五花八门。正好业务需要在因为要在手机上显示，所以必须用service来实现
原本我是想在BaseActivity的DecorView层添加一个View，奈何之前同事的Activity继承的五花八门。正好业务需要在 手机桌面 上显示一个可拖拽的FloatView。
使用到的权限
<uses-permission android:name="android.permission.SYSTEM_ALERT_WINDOW" />
实现
因为要在手机上显示，所以必须用service来实现
public class CurrentNavigateFloatViewService extends Service {
private static final String TAG = "FloatViewService";
//定义浮动窗口布局
private LinearLayout mFloatLayout;
private WindowManager.LayoutParams wmParams;
//创建浮动窗口设置布局参数的对象
private WindowManager mWindowManager;
private ImageView mFloatView;
@Override
public void onCreate() {
super.onCreate();
createFloatView();
}
private int lastX;
private int dy;
@SuppressWarnings("static-access")
@SuppressLint("InflateParams")
private void createFloatView() {
wmParams = new WindowManager.LayoutParams();
//通过getApplication获取的是WindowManagerImpl.CompatModeWrapper
mWindowManager = (WindowManager) getApplication().getSystemService(getApplication().WINDOW_SERVICE);
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;
}
//设置window type
wmParams.type = LAYOUT_FLAG;
// wmParams.type = WindowManager.LayoutParams.TYPE_PHONE;
//设置图片格式，效果为背景透明
wmParams.format = PixelFormat.RGBA_8888;
//设置浮动窗口不可聚焦（实现操作除浮动窗口外的其他可见窗口的操作）
wmParams.flags = WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE;
//调整悬浮窗显示的停靠位置为左侧置顶
wmParams.gravity = Gravity.LEFT | Gravity.TOP;
// 以屏幕左上角为原点，设置x、y初始值，相对于gravity
wmParams.x = 0;
wmParams.y = 152;
//设置悬浮窗口长宽数据
wmParams.width = WindowManager.LayoutParams.WRAP_CONTENT;
wmParams.height = WindowManager.LayoutParams.WRAP_CONTENT;
LayoutInflater inflater = LayoutInflater.from(getApplication());
//获取浮动窗口视图所在布局
mFloatLayout = (LinearLayout) inflater.inflate(R.layout.float_navigator, null);
//添加mFloatLayout
mWindowManager.addView(mFloatLayout, wmParams);
//浮动窗口按钮
mFloatView = (ImageView) mFloatLayout.findViewById(R.id.imgVew_float_view);
mFloatLayout.measure(View.MeasureSpec.makeMeasureSpec(0,
View.MeasureSpec.UNSPECIFIED), View.MeasureSpec
.makeMeasureSpec(0, View.MeasureSpec.UNSPECIFIED));
//设置监听浮动窗口的触摸移动
mFloatView.setOnTouchListener(new View.OnTouchListener() {
boolean isClick;
@SuppressLint("ClickableViewAccessibility")
@Override
public boolean onTouch(View v, MotionEvent event) {
int dx = 0;
switch (event.getAction()) {
case MotionEvent.ACTION_DOWN:
// mFloatView.setBackgroundResource(R.drawable.circle_red);
isClick = false;
lastX = (int) event.getRawX();
break;
case MotionEvent.ACTION_MOVE:
dx = (int) event.getRawX() - lastX;
isClick = true;
// getRawX是触摸位置相对于屏幕的坐标，getX是相对于按钮的坐标
wmParams.x = (int) event.getRawX()
- mFloatView.getMeasuredWidth() / 2;
// 减25为状态栏的高度
wmParams.y = (int) event.getRawY()
- mFloatView.getMeasuredHeight() / 2 - 75;
// 刷新
mWindowManager.updateViewLayout(mFloatLayout, wmParams);
return true;
case MotionEvent.ACTION_UP:
//靠边移动
int screenWidthHalf = ScreenUtil.getScreenWidth(CurrentNavigateFloatViewService.this) / 2;
int left = 0;
int right = ScreenUtil.getScreenWidth(CurrentNavigateFloatViewService.this) - mFloatLayout.getMeasuredWidth();
if (wmParams.x >= screenWidthHalf) {
wmParams.x = right;
mWindowManager.updateViewLayout(mFloatLayout, wmParams);
} else {
wmParams.x = left;
mWindowManager.updateViewLayout(mFloatLayout, wmParams);
}
return isClick;// 此处返回false则属于移动事件，返回true则释放事件，可以出发点击否。
default:
break;
}
return false;
}
});
mFloatView.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Toast.makeText(CurrentNavigateFloatViewService.this, "取消", Toast.LENGTH_SHORT).show();
}
});
}
@Override
public void onDestroy() {
super.onDestroy();
if (mFloatLayout != null) {
//移除悬浮窗口
mWindowManager.removeView(mFloatLayout);
}
}
@Override
public IBinder onBind(Intent intent) {
return null;
}
}
WindowPermissionCheck.java
public class WindowPermissionCheck {
public static boolean checkPermission(Activity activity){
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M
&& !Settings.canDrawOverlays(activity)) {
Toast.makeText(activity, "当前无权限，请授权", Toast.LENGTH_SHORT).show();
activity.startActivityForResult(
new Intent(Settings.ACTION_MANAGE_OVERLAY_PERMISSION,
Uri.parse("package:" + activity.getPackageName())), 0);
return false;
}
return true;
}
public static void onActivityResult(Activity activity,
int requestCode,
int resultCode,
Intent data,
OnWindowPermissionListener onWindowPermissionListener) {
if (requestCode == 0) {
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M
&& !Settings.canDrawOverlays(activity)) {
Toast.makeText(activity.getApplicationContext(), "授权失败", Toast.LENGTH_SHORT).show();
if(onWindowPermissionListener!=null)
onWindowPermissionListener.onFailure();
}else {
Toast.makeText(activity.getApplicationContext(), "授权成功", Toast.LENGTH_SHORT).show();
if(onWindowPermissionListener!=null)
onWindowPermissionListener.onSuccess();
}
}
}
public interface OnWindowPermissionListener{
void onSuccess();
void onFailure();
}
}
调用
因为要在手机上显示，即需要”在其他APP的上层“显示，在Android6.0以上，需要用户来”允许显示在其他应用的上层”
调用
if (WindowPermissionCheck.checkPermission(MainActivity.this)) {
Intent intent = new Intent(MainActivity.this, CurrentNavigateFloatViewService.class);
//启动FloatViewService
startService(intent);
}
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