一段时间后自动关闭窗口弹出。怎么做

Question

我试图在几秒钟后用一些时间计数器自动关闭我膨胀的弹出窗口。我不知道与计数计时器（5 秒）有什么关系。

  LayoutInflater inflater = (LayoutInflater)screen.getSystemService(screen.LAYOUT_INFLATER_SERVICE);
                    layout =  inflater.inflate(R.layout.log_viewer,null);

                    AlertDialog.Builder builder = new AlertDialog.Builder(MainActivity.this);
                    builder.setCancelable(true);
                    builder.setView(layout);

                    AlertDialog alertDialog = builder.create(); 
                    alertDialog.show();

                    Button btn0= (Button)layout.findViewById(R.id.btn0);
                    Button btn1= (Button)layout.findViewById(R.id.btn1);
                    Button btn2= (Button)layout.findViewById(R.id.btn2);
                    btn0.setOnClickListener(new OnClickListener() {

                        @Override
                        public void onClick(View v) {

                            Intent i =new Intent(Main_Activity.this,Act.class);
                            startActivity(i);
                            overridePendingTransition(R.anim.animation,R.anim.animation2);
                        }
                    });  
                    btn1.setOnClickListener(new OnClickListener() {

                        @Override
                        public void onClick(View v) {

                            Intent i =new Intent(Main_Activity.this,Activity2.class);
                            startActivity(i);
                            overridePendingTransition(R.anim.animation,R.anim.animation2);
                        }
                    });  
                    btn2.setOnClickListener(new OnClickListener() {

                        @Override
                        public void onClick(View v) {

                            Intent i =new Intent(Main_Activity.this,Activity1.class);
                            startActivity(i);
                            overridePendingTransition(R.anim.animation,R.anim.animation2);
                        }
                    });  


                    WindowManager.LayoutParams lp = new WindowManager.LayoutParams();
                    Window window = alertDialog.getWindow();
                    lp.copyFrom(window.getAttributes());

                    lp.width = WindowManager.LayoutParams.MATCH_PARENT;
                    lp.height = WindowManager.LayoutParams.WRAP_CONTENT;
                    window.setAttributes(lp);

Answer 1

您是否考虑过将Toast 与自定义布局一起使用？在 Android 上查看 Toast documentation 以开发者网站为例。

或者你可以使用Handler

Handler handler = new Handler();
handler.postDelayed(new Runnable() {

    @Override
    public void run() {
        // close your dialog
        alertDialog.dismiss();
    }

}, 10000); // 10,000 ms delay

Answer 2

像这样扩展你自己的 PopupWindow 窗口类

public class ToolTipWindow extends PopupWindow implements PopupWindow.OnDismissListener { 

    private long closeDelayTime;
    private Handler mHandler;
    private OnDismissListener mOnDismissListener;

    public ToolTipWindow(Context context) {
        super(context);
        super.setOnDismissListener(this);
    }

    public ToolTipWindow(Context context, long closeDelayTime) {
        this(context);
        this.closeDelayTime = closeDelayTime;
    }

    @Override
    public void setOnDismissListener(OnDismissListener onDismissListener) {
        mOnDismissListener = onDismissListener;
    }

    //override all show or update method of super class that you use tho call onshow
    @Override
    public void showAtLocation(View parent, int gravity, int x, int y) {
        onShow();
        super.showAtLocation(parent, gravity, x, y);
    }

    public void onShow() {
        schedule();
    }

    private void schedule() {
        if (closeDelayTime > 0) {
            if (mHandler == null) {
                mHandler = new Handler();
            }
            mHandler.removeCallbacks(closeRunnable);
            mHandler.postDelayed(closeRunnable, closeDelayTime);
        }
    }

    @Override
    public void onDismiss() {
        if (mHandler != null) {
            mHandler.removeCallbacks(closeRunnable);
        }
        if (mOnDismissListener != null) {
            mOnDismissListener.onDismiss();
        }
    }

private Runnable closeRunnable = new Runnable() {
    @Override
    public void run() {
        dismiss();
    }
};

}

这里我只重写 showAtLocation 方法，如果你使用另一个 PopUpWindow 方法来显示，重写该方法并在其中调用 onShow() 以自动调用调度。

我在代码中的某个地方调用了 mHandler.removeCallbacks(closeRunnable)，调用它非常重要，因为如果寡妇在时间过去之前关闭，它可以避免崩溃。

Answer 3

如果您想在一定延迟后执行某项操作，您可以执行以下操作：

final long TOTAL_TIME = 5000; // miliseconds

new Handler().postDelayed(new Runnable() {
    public void run() {
        // do action here
    }
}, TOTAL_TIME);