【发布时间】：2012-03-05 23:16:38
【问题描述】：
我正在创建一个亮度控制对话框。但是我遇到的问题是，当我放置 textview 然后 seekbar 时会导致此错误：
android.widget.SeekBar 无法转换为 android.widget.TextView
由于某种原因，当 .xml 上的定位跟随 seekbar 然后是 textview 时，它似乎可以工作。
这里有一些代码：
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);
}
});
【问题讨论】：
-
添加 logcat 和 XML ，我认为但不确定，由于您的 id 来自 XML 布局文件的问题您将 textview 的 id 提供给 Seekbar 检查它！