WindowManager mWindowManager;
WindowManager.LayoutParams wmParams;
LinearLayout mFloatLayout;
ImageView mFloatView;

private void createFloatView() {
    //獲取LayoutParams物件
wmParams = new WindowManager.LayoutParams();

    //獲取的是LocalWindowManager物件
mWindowManager = this.getWindowManager();
    Log.i(TAG, "mWindowManager1--->" 
 
+ this.getWindowManager());
    //mWindowManager = getWindow().getWindowManager();
Log.i(TAG, "mWindowManager2--->" + getWindow().getWindowManager());

    //獲取的是CompatModeWrapper物件
    //mWindowManager = (WindowManager) getApplication().getSystemService(Context.WINDOW_SERVICE);
Log.i(TAG, "mWindowManager3--->" 
 
+ mWindowManager);
    wmParams.type = WindowManager.LayoutParams.TYPE_SYSTEM_ALERT;
    wmParams.format = PixelFormat.RGBA_8888;
    wmParams.flags = WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE;
    wmParams.gravity = Gravity.LEFT | Gravity.TOP;
    wmParams.x = 0;
    wmParams.y = 100;
    wmParams.width = WindowManager.LayoutParams.WRAP_CONTENT;
    wmParams.height = WindowManager.LayoutParams.WRAP_CONTENT;

    LayoutInflater inflater = this
 
.getLayoutInflater();//LayoutInflater.from(getApplication());
mFloatLayout = (LinearLayout) inflater.inflate(R.layout.home_easy_touch_view, null);
    mWindowManager.addView(mFloatLayout, wmParams);
    //setContentView(R.layout.main);
mFloatView = (ImageView) mFloatLayout.findViewById(R.id.easy_touch_view_imageview);

    Log.i(TAG, "mFloatView" + mFloatView);
    Log.i(TAG, "mFloatView--parent-->" + mFloatView.getParent());
    Log.i(TAG, "mFloatView--parent--parent-->" + mFloatView.getParent().getParent());
    //繫結觸控移動監聽
mFloatView.setOnTouchListener(mTouchListener);

}

private View.OnTouchListener mTouchListener = new View.OnTouchListener() {
    float lastX, lastY;
    int paramX, paramY;
    private int mOldOffsetX;
    private int mOldOffsetY;
    private int mTag = 0;

    public boolean onTouch(View v, MotionEvent event) {
        final int action = event.getAction();

        float x = event.getRawX();
        float y = event.getRawY();

        if (mTag == 0) {
            mOldOffsetX = wmParams.x; // ƫ����
mOldOffsetY = wmParams.y; // ƫ����
}

        switch (action) {

            case MotionEvent.ACTION_MOVE:
                wmParams.x = (int) event.getRawX() - mFloatLayout.getWidth() / 2;
                //25為狀態列高度
wmParams.y = (int) event.getRawY() - mFloatLayout.getHeight() / 2 - 40;
                mWindowManager.updateViewLayout(mFloatLayout, wmParams);
                mTag = 1;
                break;

            case MotionEvent.ACTION_UP:
                motionActionUpEvent(x, y);
                break;

            default:
                break;
        }

        return true;
    }

    private void motionActionUpEvent(float x, float y) {
        int newOffsetX = wmParams.x;
        int newOffsetY = wmParams.y;
        if (Math.abs(mOldOffsetX - newOffsetX) > 50 || Math.abs(mOldOffsetY - newOffsetY) > 50) {
            mTag = 0;
        } else {
            try {
                Intent intentUhome = new Intent();
                PackageManager packageManager = getPackageManager();
                intentUhome = packageManager.getLaunchIntentForPackage(SpeechUtil.AVS_PROCESS_NAME);
                intentUhome.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK | Intent.FLAG_ACTIVITY_RESET_TASK_IF_NEEDED | Intent.FLAG_ACTIVITY_CLEAR_TOP);
                startActivity(intentUhome);

            } catch (Exception ex) {
                ex.toString();
            }
        }
    }

};

home_easy_touch_view.xml程式碼：

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:background="@android:color/transparent"
android:orientation="vertical" >

    <ImageView
android:id="@+id/easy_touch_view_imageview"
android:layout_width="200px"
android:layout_height="250px"
android:background="@drawable/icon_avs" />

</LinearLayout>

往android6.0的系統上執行時，會崩潰，丟擲permission denied for this window type異常。但在AndroidMenafest.xml中已經添加了SYSTEM_ALERT_WINDOW的許可權，

解決方法：

將

wmParams.type = WindowManager.LayoutParams.TYPE_SYSTEM_ALERT;改成

wmParams.type = WindowManager.LayoutParams.TYPE_TOAST;即可。