设置悬浮按钮

1、清单文件添加权限

2、调用此方法  initFloatBtn()

WindowManagerwm;

WindowManager.LayoutParamswmlp;

LinearLayoutlinear;

ImageViewiv;

private void  initFloatBtn() {

wm= (WindowManager) getSystemService(WINDOW_SERVICE);

wmlp=newWindowManager.LayoutParams();

wmlp.type= WindowManager.LayoutParams.TYPE_SYSTEM_ERROR;

wmlp.gravity= Gravity.BOTTOM| Gravity.RIGHT;

wmlp.format= PixelFormat.RGBA_8888;

wmlp.flags= WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE| WindowManager.LayoutParams.FLAG_FULLSCREEN

| WindowManager.LayoutParams.FLAG_LAYOUT_IN_SCREEN;

wmlp.x=10;

wmlp.y=80;

wmlp.width=80;

wmlp.height=80;

linear=newLinearLayout(getApplicationContext());

linear.setGravity(Gravity.BOTTOM| Gravity.LEFT);

//组件

iv=newImageView(this);//文本

iv.setImageResource(R.mipmap.add_photo);

linear.addView(iv);//将textview添加进布局

wm.addView(linear,wmlp);//窗口管理器添加这个部件

iv.setOnClickListener(newView.OnClickListener() {

@Override

public voidonClick(View v) {

ToastUtils.StrToast(mContext,"添加相册");

LogUtils.e(TAG,"WindowManagerWindowManagerWindowManager");

openChooser();

}

});

}

@Override

protected voidonStop() {

super.onPause();

LogUtils.e(TAG,"onStop()---onStop()");

if(wm!=null) {

wm.removeViewImmediate(linear);

linear=null;

}

}

@Override

protected voidonDestroy() {

super.onDestroy();

if(wm!=null) {

wm.removeViewImmediate(linear);

linear=null;

}

}