SeekBar和EditText互相改变引起的Stackoverflow错误

Question

所以我有一个SeekBar与输入类型编号的EditText一起设置.

我希望它是这样的,如果用户输入一个可行范围内的数字,它将改变SeekBar的进度.此外; 如果用户通过拖动SeekBar决定他们宁愿改变; 而是将EditText更改为SeekBar的当前值.

我收到一个试图实现这个的stackoverflow,我相信这是因为我们都使用他们的onChanged监听器.所以他们正在对彼此造成无限的变化.

如果是这样的话; 如何解释,我将如何实现我想要的结果？

码:

s1.setOnSeekArcChangeListener(new SeekArc.OnSeekArcChangeListener() {

        @Override
        public void onStopTrackingTouch(SeekArc seekArc) {
            // TODO Auto-generated method stub

        }

        @Override
        public void onStartTrackingTouch(SeekArc seekArc) {
            // TODO Auto-generated method stub

        }

        @Override
        public void onProgressChanged(SeekArc seekArc, int progress,
                boolean fromUser) {
                            if(progress != Integer.parseInt(et1.getText().toString()))
            et1.setText(String.valueOf(progress));
            // TODO Auto-generated method stub

        }
    });

et1.addTextChangedListener(new TextWatcher(){

        @Override
        public void afterTextChanged(Editable s) {
            // TODO Auto-generated method stub
            int i = Integer.parseInt(s.toString());
            if(i != Integer.parseInt(et1.getText().toString()))
            s1.setProgress(i);
        }

        @Override
        public void beforeTextChanged(CharSequence arg0, int arg1,
                int arg2, int arg3) {
            // TODO Auto-generated method stub

        }

        @Override
        public void onTextChanged(CharSequence arg0, int arg1, int arg2,
                int arg3) {
            // TODO Auto-generated method stub
        }

    });

logcat的:

    03-18 14:38:59.104: E/AndroidRuntime(2894): FATAL EXCEPTION: main
03-18 14:38:59.104: E/AndroidRuntime(2894): java.lang.StackOverflowError
03-18 14:38:59.104: E/AndroidRuntime(2894):     at android.text.DynamicLayout.reflow(DynamicLayout.java:284)
03-18 14:38:59.104: E/AndroidRuntime(2894):     at android.text.DynamicLayout.<init>(DynamicLayout.java:170)
03-18 14:38:59.104: E/AndroidRuntime(2894):     at android.widget.TextView.makeSingleLayout(TextView.java:5867)
03-18 14:38:59.104: E/AndroidRuntime(2894):     at android.widget.TextView.makeNewLayout(TextView.java:5765)
03-18 14:38:59.104: E/AndroidRuntime(2894):     at android.widget.TextView.checkForRelayout(TextView.java:6304)
03-18 14:38:59.104: E/AndroidRuntime(2894):     at android.widget.TextView.setText(TextView.java:3567)
03-18 14:38:59.104: E/AndroidRuntime(2894):     at android.widget.TextView.setText(TextView.java:3425)
03-18 14:38:59.104: E/AndroidRuntime(2894):     at android.widget.EditText.setText(EditText.java:80)
03-18 14:38:59.104: E/AndroidRuntime(2894):     at android.widget.TextView.setText(TextView.java:3400)
03-18 14:38:59.104: E/AndroidRuntime(2894):     at com.nanospark.upcdemo.HomeFragment$1.onProgressChanged(HomeFragment.java:61)
03-18 14:38:59.104: E/AndroidRuntime(2894):     at com.triggertrap.seekarc.SeekArc.updateProgress(SeekArc.java:425)
03-18 14:38:59.104: E/AndroidRuntime(2894):     at com.triggertrap.seekarc.SeekArc.setProgress(SeekArc.java:454)
03-18 14:38:59.104: E/AndroidRuntime(2894):     at com.nanospark.upcdemo.HomeFragment$5.afterTextChanged(HomeFragment.java:116)
03-18 14:38:59.104: E/AndroidRuntime(2894):     at android.widget.TextView.sendAfterTextChanged(TextView.java:7119)
03-18 14:38:59.104: E/AndroidRuntime(2894):     at android.widget.TextView.setText(TextView.java:3574)
03-18 14:38:59.104: E/AndroidRuntime(2894):     at android.widget.TextView.setText(TextView.java:3425)
03-18 14:38:59.104: E/AndroidRuntime(2894):     at android.widget.EditText.setText(EditText.java:80)
03-18 14:38:59.104: E/AndroidRuntime(2894):     at android.widget.TextView.setText(TextView.java:3400)
03-18 14:38:59.104: E/AndroidRuntime(2894):     at com.nanospark.upcdemo.HomeFragment$1.onProgressChanged(HomeFragment.java:61)
03-18 14:38:59.104: E/AndroidRuntime(2894):     at com.triggertrap.seekarc.SeekArc.updateProgress(SeekArc.java:425)
03-18 14:38:59.104: E/AndroidRuntime(2894):     at com.triggertrap.seekarc.SeekArc.setProgress(SeekArc.java:454)
03-18 14:38:59.104: E/AndroidRuntime(2894):     at com.nanospark.upcdemo.HomeFragment$5.afterTextChanged(HomeFragment.java:116)
03-18 14:38:59.104: E/AndroidRuntime(2894):     at android.widget.TextView.sendAfterTextChanged(TextView.java:7119)
03-18 14:38:59.104: E/AndroidRuntime(2894):     at android.widget.TextView.setText(TextView.java:3574)
03-18 14:38:59.104: E/AndroidRuntime(2894):     at android.widget.TextView.setText(TextView.java:3425)
03-18 14:38:59.104: E/AndroidRuntime(2894):     at android.widget.EditText.setText(EditText.java:80)
03-18 14:38:59.104: E/AndroidRuntime(2894):     at android.widget.TextView.setText(TextView.java:3400)
03-18 14:38:59.104: E/AndroidRuntime(2894):     at com.nanospark.upcdemo.HomeFragment$1.onProgressChanged(HomeFragment.java:61)
03-18 14:38:59.104: E/AndroidRuntime(2894):     at com.triggertrap.seekarc.SeekArc.updateProgress(SeekArc.java:425)
03-18 14:38:59.104: E/AndroidRuntime(2894):     at com.triggertrap.seekarc.SeekArc.setProgress(SeekArc.java:454)
03-18 14:38:59.104: E/AndroidRuntime(2894):     at com.nanospark.upcdemo.HomeFragment$5.afterTextChanged(HomeFragment.java:116)
03-18 14:38:59.104: E/AndroidRuntime(2894):     at android.widget.TextView.sendAfterTextChanged(TextView.java:7119)
03-18 14:38:59.104: E/AndroidRuntime(2894):     at android.widget.TextView.setText(TextView.java:3574)
03-18 14:38:59.104: E/AndroidRuntime(2894):     at android.widget.TextView.setText(TextView.java:3425)
03-18 14:38:59.104: E/AndroidRuntime(2894):     at android.widget.EditText.setText(EditText.java:80)
03-18 14:38:59.104: E/AndroidRuntime(2894):     at android.widget.TextView.setText(TextView.java:3400)
03-18 14:38:59.104: E/AndroidRuntime(2894):     at com.nanospark.upcdemo.HomeFragment$1.onProgressChanged(HomeFragment.java:61)
03-18 14:38:59.104: E/AndroidRuntime(2894):     at com.triggertrap.seekarc.SeekArc.updateProgress(SeekArc.java:425)
03-18 14:38:59.104: E/AndroidRuntime(2894):     at com.triggertrap.seekarc.SeekArc.setProgress(SeekArc.java:454)
03-18 14:38:59.104: E/AndroidRuntime(2894):     at com.nanospark.upcdemo.HomeFragment$5.afterTextChanged(HomeFragment.java:116)
03-18 14:38:59.104: E/AndroidRuntime(2894):     at android.widget.TextView.sendAfterTextChanged(TextView.java:7119)
03-18 14:38:59.104: E/AndroidRuntime(2894):     at android.widget.TextView.setText(TextView.java:3574)
03-18 14:38:59.104: E/AndroidRuntime(2894):     at android.widget.TextView.setText(TextView.java:3425)
03-18 14:38:59.104: E/AndroidRuntime(2894):     at android.widget.EditText.setText(EditText.java:80)
03-18 14:38:59.104: E/AndroidRuntime(2894):     at android.widget.TextView.setText(TextView.java:3400)
03-18 14:38:59.104: E/AndroidRuntime(2894):     at com.nanospark.upcdemo.HomeFragment$1.onProgressChanged(HomeFragment.java:61)
03-18 14:38:59.104: E/AndroidRuntime(2894):     at com.triggertrap.seekarc.SeekArc.updateProgress(SeekArc.java:425)
03-18 14:38:59.104: E/AndroidRuntime(2894):     at com.triggertrap.seekarc.SeekArc.setProgress(SeekArc.java:454)
03-18 14:38:59.104: E/AndroidRuntime(2894):     at com.nanospark.upcdemo.HomeFragment$5.afterTextChanged(HomeFragment.java:116)
03-18 14:38:59.104: E/AndroidRuntime(2894):     at android.widget.TextView.sendAfterTextChanged(TextView.java:7119)
03-18 14:38:59.104: E/AndroidRuntime(2894):     at android.widget.TextView.setText(TextView.java:3574)
03-18 14:38:59.104: E/AndroidRuntime(2894):     at android.widget.TextView.setText(TextView.java:3425)
03-18 14:38:59.104: E/AndroidRuntime(2894):     at android.widget.EditText.setText(EditText.java:80)
03-18 14:38:59.104: E/AndroidRuntime(2894):     at android.widget.TextView.setText(TextView.java:3400)
03-18 14:38:59.104: E/AndroidRuntime(2894):     at com.nanospark.upcdemo.HomeFragment$1.onProgressChanged(HomeFragment.java:61)
03-18 14:38:59.104: E/AndroidRuntime(2894):     at com.triggertrap.seekarc.SeekArc.updateProgress(SeekArc.java:425)
03-18 14:38:59.104: E/AndroidRuntime(2894):     at com.triggertrap.seekarc.SeekArc.setProgress(SeekArc.java:454)
03-18 14:38:59.104: E/AndroidRuntime(2894):     at com.nanospark.upcdemo.HomeFragment$5.afterTextChanged(HomeFragment.java:116)
03-18 14:38:59.104: E/AndroidRuntime(2894):     at android.widget.TextView.sendAfterTextChanged(TextView.java:7119)
03-18 14:38:59.104: E/AndroidRuntime(2894):     at android.widget.TextView.setText(TextView.java:3574)
03-18 14:38:59.104: E/AndroidRuntime(2894):     at android.widget.TextView.setText(TextView.java:3425)
03-18 14:38:59.104: E/AndroidRuntime(2894):     at android.widget.EditText.setText(EditText.java:80

Answer 1

在afterTextChanged中 - 在设置进度之前,禁用搜索栏侦听器setOnSeekArcChangeListener(null).然后再次添加侦听器.

    @Override
    public void afterTextChanged(Editable s) 
    {
        s1.setOnSeekArcChangeListener(null);
        // TODO Auto-generated method stub
        int i = Integer.parseInt(s.toString());
        if(i>=0 && i<100)
        s1.setProgress(i);
        s1.setOnSeekArcChangeListener(mSeekListener);   
    }

Answer 2

在onProgressChanged(SeekArc seekArc, int progress, boolean fromUser)你有一个fromUser变量.EditText如果用户不是擦洗SeekBar/Arc的用户,则不要在您的文本上设置文本(文本已经被认为是正确的,因为它启动了事件链......)

在你的听众中:

@Override
public void onProgressChanged(SeekArc seekArc, int progress, boolean fromUser) {
    if(fromUser && progress != Integer.parseInt(et1.getText().toString())) {
        et1.setText(String.valueOf(progress));
    }
}