Question

这是我的MainActivity中代码的一部分。 stopwatch1是MainActivity中调用的图像按钮：

           stopwatch1 = (ImageButton)findViewById(R.id.stopwatch1);

我已经尝试过搜索有关如何使用dialog.setOnDismissListener的线索，但是，没有正确的答案来帮助我在故意或意外退出对话后杀死音频。任何帮助将不胜感激。

           stopwatch1.setOnClickListener(new View.OnClickListener() {

                    @Override
                    public void onClick(View v) {
                        final Dialog mmDialog1 = new Dialog(context);
                        mmDialog1.setContentView(R.layout.countdowntimer);
                        mmDialog1.setTitle("Stop-watch");            
                        Button ddButton1 = (Button) mmDialog1.findViewById(R.id.countdown_exit);
                        final Button ddButton2 = (Button) mmDialog1.findViewById(R.id.countdown_start);
                        final TextView timeview = (TextView) mmDialog1.findViewById(R.id.timeview);
                        ddButton2.setTag(1);

                        ddButton2.setOnClickListener(new OnClickListener() {
                            @Override
                            public void onClick(View v) {
                                final int status = (Integer) v.getTag();

                                if (status == 1) {
                                    ddButton2.setText("Stop");
                                    countDownTimer = new CountDownTimer(60000, 1000) {

                                        public void onTick(long millisUntilFinished) {
                                            int time = (int) (millisUntilFinished/1000);
                                            timeview.setText(Integer.toString(time));
                                        }
                                        @Override
                                        public void onFinish() {
                                            timeview.setText("60");
                                            ddButton2.setText("Start");
                                            MediaPlayer stop = MediaPlayer.create(context, R.raw.stop);
                                            stop.start();
                                        }
                                    }.start();
                                    v.setTag(0);

                                } else {
                                    ddButton2.setText("Start");
                                    timeview.setText("60");
                                    countDownTimer.cancel();
                                    v.setTag(1);
                                }
                            }

                        });

                        ddButton1.setOnClickListener(new OnClickListener() {
                            @Override
                            public void onClick(View v) {
                                mmDialog1.dismiss();
                            }
                        });

                        mmDialog1.show();
                    }
                });

Answer 1

我的建议是实现一个接口。对话框关闭后，将回调关闭媒体播放器。

这是一个简单的例子。

<强>接口

public interface DialogClosed {
    void shutDownMediaPlayer();
}

然后在调用活动

中实现接口

<强>活性

public class MainActivity extends Activity implements DialogClosed {
    ....
    @Override
    public void shutDownMediaPlayer() {
        //shut down media player here
    }
}

此外，您可以添加一个布尔值来检查对话框是否显示为

boolean isShowing = mDialog.isShowing();

然后你可以随时关闭媒体播放器，如果这是假的话。

Answer 2

所以我使用了Jawascript中的一些指针，并且稍微编辑了我的代码，现在它可以工作了：

            stopwatch1.setOnClickListener(new View.OnClickListener() {

                    @Override
                    public void onClick(View v) {
                        final Dialog mmDialog1 = new Dialog(context);
                        mmDialog1.setContentView(R.layout.countdowntimer);
                        mmDialog1.setTitle("Stop-watch");            
                        Button ddButton1 = (Button) mmDialog1.findViewById(R.id.countdown_exit);
                        final Button ddButton2 = (Button) mmDialog1.findViewById(R.id.countdown_start);
                        final TextView timeview = (TextView) mmDialog1.findViewById(R.id.timeview);
                        final MediaPlayer stop = MediaPlayer.create(context, R.raw.stop);

                        ddButton2.setTag(1);

                        mmDialog1.setCancelable(false);

                        if (mmDialog1.isShowing() == false) {
                            stop.stop();
                        }

                        ddButton2.setOnClickListener(new OnClickListener(){
                            @Override
                            public void onClick(View v) {
                                final int status = (Integer) v.getTag();

                                if (status == 1) {
                                    ddButton2.setText("Stop");
                                    countDownTimer = new CountDownTimer(60000, 1000) {

                                        public void onTick(long millisUntilFinished) {
                                            int time = (int) (millisUntilFinished/1000);
                                            timeview.setText(Integer.toString(time));
                                        }
                                        @Override
                                        public void onFinish() {
                                            timeview.setText("60");
                                            ddButton2.setText("Start");
                                            try {
                                                stop.prepare();
                                            } catch (IllegalStateException e) {
                                                e.printStackTrace();
                                            } catch (IOException e) {
                                                e.printStackTrace();
                                            }
                                            stop.start();
                                        }
                                    }.start();
                                    v.setTag(0);

                                } else {
                                    ddButton2.setText("Start");
                                    timeview.setText("60");
                                    countDownTimer.cancel();
                                    v.setTag(1);
                                    stop.stop();
                                }
                            }

                        });

                        ddButton1.setOnClickListener(new OnClickListener() {
                            @Override
                            public void onClick(View v) {
                                mmDialog1.dismiss();
                            }
                        });

                        mmDialog1.show();
                    }
                });

故意或意外退出对话后杀死音频

2 个答案: