Android中使用WindowManager在界面布局上添加浮动窗口

如果大家看过一些游戏sdk中的功能，现在大多都有悬浮窗口这个功能。如360，uc等等。。

这里不需要定义service，只需要这只WindowsManager中的LayoutParams就可以达到这个悬浮框可以绑定界面的功能。

话不多说，先上代码：

public class FloatBox extends BasicView {
LinearLayout mFloatLayout;
FloatButton floatView;
String TAG = "FloatBox";
WindowManager.LayoutParams windowParams;
WindowManager mWindowManager;
float mStartX = 0;
float mStartY = 0;

public FloatBox(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
// TODO Auto-generated constructor stub
}

public FloatBox(Context context, AttributeSet attrs) {
super(context, attrs);
// TODO Auto-generated constructor stub
}

public FloatBox(Context context, String str) {
super(context, str);
// TODO Auto-generated constructor stub
}

public FloatBox(Context context) {
super(context);
// TODO Auto-generated constructor stub
}

@Override
protected void init(Context context) {
// TODO Auto-generated method stub
initWindowBox(context);
}

private void initViewBox(Context context){
mFloatLayout = new LinearLayout(context);
LinearLayout.LayoutParams mFloatLayoutLP = new LinearLayout.LayoutParams(
LinearLayout.LayoutParams.WRAP_CONTENT,
LinearLayout.LayoutParams.WRAP_CONTENT);
mFloatLayout.setLayoutParams(mFloatLayoutLP);
mFloatLayout.setOrientation(LinearLayout.VERTICAL);
floatView = new FloatButton(context);
LinearLayout.LayoutParams floatViewLp = new LinearLayout.LayoutParams(
MetricUtil.getDip(context, 50), MetricUtil.getDip(context, 50));
floatView.setLayoutParams(floatViewLp);
mFloatLayout.addView(floatView);
}
/**
* 用windowManager来添加box
* @param context
*/
private void initWindowBox(Context context){
windowParams = new WindowManager.LayoutParams();
mWindowManager = (WindowManager) context
.getSystemService(context.WINDOW_SERVICE);
// 设置window type 这里使用的type是1000 - 2000之间的，需要绑定token
// 如果使用2000以上的类型的话，一般适用于桌面上的悬浮窗.
windowParams.type = WindowManager.LayoutParams.TYPE_APPLICATION;
windowParams.format = PixelFormat.RGBA_8888;
windowParams.flags = WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE;
windowParams.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
windowParams.x = 0;
windowParams.y = 0;
// 长宽设置
windowParams.width = WindowManager.LayoutParams.WRAP_CONTENT;
windowParams.height = WindowManager.LayoutParams.WRAP_CONTENT;

mFloatLayout = new LinearLayout(context);
LinearLayout.LayoutParams mFloatLayoutLP = new LinearLayout.LayoutParams(
LinearLayout.LayoutParams.WRAP_CONTENT,
LinearLayout.LayoutParams.WRAP_CONTENT);
mFloatLayout.setLayoutParams(mFloatLayoutLP);
mFloatLayout.setOrientation(LinearLayout.VERTICAL);

// 绑定token
windowParams.token = mFloatLayout.getWindowToken();
// 添加layout
mWindowManager.addView(mFloatLayout, windowParams);
floatView = new FloatButton(context);
LinearLayout.LayoutParams floatViewLp = new LinearLayout.LayoutParams(
MetricUtil.getDip(context, 50), MetricUtil.getDip(context, 50));
floatView.setLayoutParams(floatViewLp);
mFloatLayout.addView(floatView);
mFloatLayout.measure(View.MeasureSpec.makeMeasureSpec(0,
View.MeasureSpec.UNSPECIFIED), View.MeasureSpec
.makeMeasureSpec(0, View.MeasureSpec.UNSPECIFIED));
Log.i(TAG, "Width/2--->" + floatView.getMeasuredWidth() / 2);
Log.i(TAG, "Height/2--->" + floatView.getMeasuredHeight() / 2);

floatView.setOnTouchListener(new OnTouchListener() {

@Override
public boolean onTouch(View v, MotionEvent event) {
// TODO Auto-generated method stub
System.out.println("onTouch ");
switch (event.getAction()) {
case MotionEvent.ACTION_DOWN:

break;
case MotionEvent.ACTION_MOVE:
//加一个值,更方便点击
if(Math.abs(event.getRawX() - mStartX) > 30){
mStartX = event.getRawX();
}
if(Math.abs(event.getRawY() - mStartY) > 30){
mStartY = event.getRawY();
}
updatePosition();
break;
case MotionEvent.ACTION_UP:

break;
default:
break;
}
//				if(event.getAction() == MotionEvent.ACTION_MOVE){
//
//				Log.i(TAG, "event.getRawX()--->" + event.getRawX());
//				Log.i(TAG, "event.getRawX()--->" + event.getRawY());
//				mStartX = event.getRawX();
//				mStartY = event.getRawY();
//				}else if(event.getAction() == MotionEvent.ACTION_UP){
//					return true;
//				}
return false;
}
});
final Context mcontext = context;
floatView.setOnClickListener(new OnClickListener() {

@Override
public void onClick(View v) {
// TODO Auto-generated method stub
Toast.makeText(mcontext, "floatView onclick", 1000).show();
return;
}
});
}

private void updatePosition(){
windowParams.x = (int) (mStartX - floatView
.getMeasuredWidth() / 2);
windowParams.y = (int) (mStartY - floatView
.getMeasuredHeight() / 2);
// refresh
Log.i(TAG, "x--->" + windowParams.x);
Log.i(TAG, "y--->" + windowParams.y);
mWindowManager.updateViewLayout(mFloatLayout, windowParams);
}

public void showBox() {
mFloatLayout.setVisibility(View.VISIBLE);
}

public void hideBox() {
mFloatLayout.setVisibility(View.GONE);
}

public void removeBox() {
mWindowManager.removeView(mFloatLayout);
}

}

然后，以下是自定义button的代码：

public class FloatButton extends Button {

public FloatButton(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
// TODO Auto-generated constructor stub
init();
}

public FloatButton(Context context, AttributeSet attrs) {
super(context, attrs);
// TODO Auto-generated constructor stub
init();
}

public FloatButton(Context context) {
super(context);
// TODO Auto-generated constructor stub
init();
}

private void init() {
Decorator.setStateImage(this,
ResourceLoader.getBitmapDrawable("appicon_normal.png"),
ResourceLoader.getBitmapDrawable("appicon_hover.png"),
ResourceLoader.getBitmapDrawable("appicon_normal.png"));
}
}