[英]Get seekbar progress from Dialog
我试图建立一个使用自定义布局的对话框,但是我无法从搜索栏中获取音量和获取值,它给出了nullpointer异常。 这是代码:
Dialog soundoptions= new Dialog(this);
soundoptions.setContentView(R.layout.soundoptions);
soundoptions.setTitle("Sound Options");
soundoptions.setOnDismissListener(new OnDismissListener() {
@Override
public void onDismiss(DialogInterface dialog) {
// TODO Auto-generated method stub
SeekBar vs=(SeekBar) findViewById(R.id.volume);
SeekBar vg=(SeekBar) findViewById(R.id.gain);
vg.setOnSeekBarChangeListener(new OnSeekBarChangeListener() {
@Override
public void onStopTrackingTouch(SeekBar seekBar) {
// TODO Auto-generated method stub
}
@Override
public void onStartTrackingTouch(SeekBar seekBar) {
// TODO Auto-generated method stub
}
@Override
public void onProgressChanged(SeekBar seekBar, int progress,
boolean fromUser) {
// TODO Auto-generated method stub
gain=progress;
}
});
vs.setOnSeekBarChangeListener(new OnSeekBarChangeListener() {
@Override
public void onStopTrackingTouch(SeekBar seekBar) {
// TODO Auto-generated method stub
}
@Override
public void onStartTrackingTouch(SeekBar seekBar) {
// TODO Auto-generated method stub
}
@Override
public void onProgressChanged(SeekBar seekBar, int progress,
boolean fromUser) {
// TODO Auto-generated method stub
volume=progress;
}
});
vs和vg为空。
采用 ...
SeekBar vs=(SeekBar) dialog.findViewById(R.id.volume);
SeekBar vg=(SeekBar) dialog.findViewById(R.id.gain);
注意“对话框” ...
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