always on top button in android

public class PopupService extends Service implements IPopupTouchPosListener
{
public final static String FIELD_EVENT = "event";
/**
* 开启
*/
public final static int EVENT_SWITCH_ON = 1;

/**
* 关闭
*/
public final static int EVENT_SWITCH_OFF = 2;

private CustomPopupView mPopupView;
private int mCurrentY;

private RelativeLayout mLayout;

private WindowManager mWindowManager;
private WindowManager.LayoutParams mWmlp;

@Override
public void onCreate()
{
// TODO Auto-generated method stub
super.onCreate();

mWindowManager = (WindowManager)getSystemService(Context.WINDOW_SERVICE);

// 获取屏幕宽度
DisplayMetrics outMetrics = new DisplayMetrics();
mWindowManager.getDefaultDisplay().getMetrics(outMetrics);
int width = outMetrics.widthPixels;

mWmlp = new WindowManager.LayoutParams(LayoutParams.FILL_PARENT, LayoutParams.WRAP_CONTENT);
mWmlp.alpha = 0.5f;
mWmlp.flags = WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE; // 不能抢占聚焦点
mWmlp.flags = mWmlp.flags | WindowManager.LayoutParams.FLAG_WATCH_OUTSIDE_TOUCH;
mWmlp.flags = mWmlp.flags | WindowManager.LayoutParams.FLAG_LAYOUT_NO_LIMITS; // 排版不受限制
mWmlp.type = WindowManager.LayoutParams.TYPE_SYSTEM_ALERT;     // 系统提示类型
mWmlp.width = width;
mWmlp.height = 30;
mWmlp.gravity = 2;
mWmlp.format = -1;
mWmlp.token = null;
mWmlp.x = 0;
mWmlp.y = 200;

mCurrentY = mWmlp.y;

mLayout = new RelativeLayout(this);
mLayout.setBackgroundColor(0x00FFFFFF);
mLayout.setLayoutParams(new LayoutParams(LayoutParams.FILL_PARENT, LayoutParams.WRAP_CONTENT));

mPopupView = new CustomPopupView(this);
mPopupView.setTouchPosListener(this);
RelativeLayout.LayoutParams lp = new RelativeLayout.LayoutParams(LayoutParams.FILL_PARENT, 30);

lp.bottomMargin = 0;
lp.leftMargin = 0;

mLayout.addView(mPopupView, lp);
}

@Override
public void onStart(Intent intent, int startId)
{
super.onStart(intent, startId);

Log.i(Constants.LOG_TAG, "popup service onstart");

String action = intent.getAction();
if(action != null && action.equals(ActionDef.ACTION_POPUP_SERVICE))
{
Bundle bundle = intent.getExtras();
if(bundle != null)
{
int event = bundle.getInt(FIELD_EVENT);
if(event == EVENT_SWITCH_ON)
{
// 显示
mWindowManager.addView(mLayout, mWmlp);
}
else
{
mWindowManager.removeView(mLayout);
}
}
}
}

@Override
public IBinder onBind(Intent intent)
{
// TODO Auto-generated method stub
return null;
}

@Override
public void onMove(float x, float y)
{
if(mLayout != null)
{
Log.i(Constants.LOG_TAG, "y = " + y);
if(y > mLayout.getHeight())
{
mCurrentY = (int)y + mCurrentY - mLayout.getHeight();
}
else if(y < 0)
{
mCurrentY = (int)y + mCurrentY;
}

// 只更新位置
mWmlp.y = mCurrentY;
mWindowManager.updateViewLayout(mLayout, mWmlp);
}
}

}

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answered Sep 28 '10 at 1:54 yuankai 417

import android.app.Service;
import android.content.Context;
import android.content.Intent;
import android.graphics.Canvas;
import android.graphics.Paint;
import android.graphics.PixelFormat;
import android.os.IBinder;
import android.view.Gravity;
import android.view.MotionEvent;
import android.view.ViewGroup;
import android.view.WindowManager;
import android.widget.AbsoluteLayout;
import android.widget.Button;
import android.widget.LinearLayout;
import android.widget.RelativeLayout;
import android.widget.Toast;

public class HUD extends Service {
HUDView mView;

@Override
public IBinder onBind(Intent intent) {
return null;
}

@Override
public void onCreate() {
super.onCreate();
Toast.makeText(getBaseContext(),"onCreate", Toast.LENGTH_LONG).show();
mView = new HUDView(this);
WindowManager.LayoutParams params = new WindowManager.LayoutParams(
WindowManager.LayoutParams.WRAP_CONTENT,
WindowManager.LayoutParams.WRAP_CONTENT,
WindowManager.LayoutParams.TYPE_SYSTEM_OVERLAY,
0,
//              WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE
//                      | WindowManager.LayoutParams.FLAG_NOT_TOUCHABLE,
PixelFormat.TRANSLUCENT);
params.gravity = Gravity.RIGHT | Gravity.TOP;
params.setTitle("Load Average");
WindowManager wm = (WindowManager) getSystemService(WINDOW_SERVICE);
wm.addView(mView, params);
}

@Override
public void onDestroy() {
super.onDestroy();
Toast.makeText(getBaseContext(),"onDestroy", Toast.LENGTH_LONG).show();
if(mView != null)
{
((WindowManager) getSystemService(WINDOW_SERVICE)).removeView(mView);
mView = null;
}
}
}

class HUDView extends ViewGroup {
private Paint mLoadPaint;

public HUDView(Context context) {
super(context);
Toast.makeText(getContext(),"HUDView", Toast.LENGTH_LONG).show();

mLoadPaint = new Paint();
mLoadPaint.setAntiAlias(true);
mLoadPaint.setTextSize(10);
mLoadPaint.setARGB(255, 255, 0, 0);
}

@Override
protected void onDraw(Canvas canvas) {
super.onDraw(canvas);
canvas.drawText("Hello World", 5, 15, mLoadPaint);
}

@Override
protected void onLayout(boolean arg0, int arg1, int arg2, int arg3, int arg4) {
}

@Override
public boolean onTouchEvent(MotionEvent event) {
//return super.onTouchEvent(event);
Toast.makeText(getContext(),"onTouchEvent", Toast.LENGTH_LONG).show();
return true;
}
}

android

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asked Dec 19 '10 at 1:57 coreSOLO 1207 100% accept rate

@Override
public void onCreate() {
super.onCreate();
Toast.makeText(getBaseContext(),"onCreate", Toast.LENGTH_LONG).show();
mView = new HUDView(this);
WindowManager.LayoutParams params = new WindowManager.LayoutParams(
WindowManager.LayoutParams.WRAP_CONTENT,
WindowManager.LayoutParams.WRAP_CONTENT,
WindowManager.LayoutParams.TYPE_SYSTEM_OVERLAY,
WindowManager.LayoutParams.FLAG_WATCH_OUTSIDE_TOUCH,
PixelFormat.TRANSLUCENT);
params.gravity = Gravity.RIGHT | Gravity.TOP;
params.setTitle("Load Average");
WindowManager wm = (WindowManager) getSystemService(WINDOW_SERVICE);
wm.addView(mView, params);
}

// ATTENTION: GET THE X,Y OF EVENT FROM THE PARAMETER
// THEN CHECK IF THAT IS INSIDE YOUR DESIRED AREA

Toast.makeText(getContext(),"onTouchEvent", Toast.LENGTH_LONG).show();
return true;
}

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answered Dec 19 '10 at 12:12 Sarwar Erfan 2,879114