我正在創建一個亮度控制對話框。但是我遇到的問題是,當我把TextView的那麼搜索條它會導致這個錯誤:android.widget.SeekBar不能轉換爲android.widget.TextView
android.widget.SeekBar cannot be cast to android.widget.TextView
出於某種原因,似乎當.XML定位如下搜索條,然後TextView的工作。
下面是一些代碼:
LayoutInflater li_brightness = (LayoutInflater)this.getSystemService(LAYOUT_INFLATER_SERVICE);
View v_brightness = li_brightness.inflate(R.layout.options_dialog_brightness, (ViewGroup)findViewById(R.id.ll_brightness_layout));
bright_textView = (TextView)v_brightness.findViewById(R.id.brightness_text);
brightBar = (SeekBar)v_brightness.findViewById(R.id.seekbar_brightness);
confirm_brightness = (Button)v_brightness.findViewById(R.id.button_brightness);
cResolver = getContentResolver();
window = getWindow();
brightBar.setMax(100);
brightBar.setProgress(50);
brightBar.setKeyProgressIncrement(1);
bright_textView.setText("50".toString());
brightBar.setOnSeekBarChangeListener(new OnSeekBarChangeListener() {
public void onStopTrackingTouch(SeekBar seekBar) {
// TODO Auto-generated method stub
}
public void onStartTrackingTouch(SeekBar seekBar) {
// TODO Auto-generated method stub
}
public void onProgressChanged(SeekBar seekBar, int progress,
boolean fromUser) {
// TODO Auto-generated method stub
float BackLightValue = (float)progress/100;
if(BackLightValue <= 0){
bright_textView.setText(String.valueOf(BackLightValue));
}
WindowManager.LayoutParams layoutParams = getWindow().getAttributes();
layoutParams.screenBrightness = BackLightValue;
getWindow().setAttributes(layoutParams);
}
});
添加logcat和XML,我認爲但不是很確定,由於您的id來自XML佈局文件的問題您將Textview的id提供給Seekbar檢查它! – 2012-03-05 14:25:43