scope 之外的 Android/Java 變量可能

Question

當我運行下面的代碼時，一切都很順利，直到我更改了 seekBar 的值。 onProgressChange 更改 myValue 的文本值。 我強行關閉，它給了我下面的日志貓條目。

在進行調試時，拋出的異常表示找不到 ID 2，您可以看出它是 myValue，這是意料之中的。 請讓我知道你的想法。 謝謝

04-06 18:15:38.576: E/AndroidRuntime(25164):android.content.res.Resources$NotFoundException: String resource ID #0x2f
04-06 18:15:38.576: E/AndroidRuntime(25164):    at android.content.res.Resources.getText(Resources.java:201)
04-06 18:15:38.576: E/AndroidRuntime(25164):    at android.widget.TextView.setText(TextView.java:2877)
04-06 18:15:38.576: E/AndroidRuntime(25164):    at thisPackage.Tabs.CustomSeekBar.onProgressChanged(CustomSeekBar.java:74)

顏色活動（主要）

public class ColorsActivity extends Activity
{
CustomSeekBar red = new CustomSeekBar();
RelativeLayout theItem;

public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);

    setContentView(R.layout.seekbarlist);     
    RelativeLayout thisOne = (RelativeLayout)findViewById(R.id.mainLayout);



    attachLayout(thisOne, red, "red", 1);
    //attachLayout(thisOne, "blue", 2);
    //attachLayout(thisOne, "green", 3);

   // Amarino.connect(this, "00:11:11:21:05:53");
}
public void attachLayout(RelativeLayout layout, CustomSeekBar object, String label, int id)
{

    theItem = object.createCustomSeekBar(this, label);
    theItem.setId(id);
    RelativeLayout.LayoutParams myLayoutParams  =  new RelativeLayout.LayoutParams(ViewGroup.LayoutParams.FILL_PARENT, ViewGroup.LayoutParams.WRAP_CONTENT);
    myLayoutParams.addRule(RelativeLayout.BELOW,id-1);
    theItem.setLayoutParams(myLayoutParams);
    layout.addView(theItem, id);
}


}

自定義搜索欄

public class CustomSeekBar implements SeekBar.OnSeekBarChangeListener {

  Context myContext;
 RelativeLayout myLayout;
  TextView myValue;
  TextView myLabel;
  SeekBar mySeekBar;

  public void CustomSeekBar(){

  }


public RelativeLayout createCustomSeekBar(Context context, String label){


    myContext = context;                
    myLayout = new RelativeLayout(myContext); 


    mySeekBar = new SeekBar(myContext);
    myLabel = new TextView(myContext);
    myValue = new TextView(myContext);  

    mySeekBar.setId(1);
    myLabel.setId(2);
    myValue.setId(3);

    RelativeLayout.LayoutParams mySeekBarParams =  new RelativeLayout.LayoutParams(RelativeLayout.LayoutParams.FILL_PARENT, RelativeLayout.LayoutParams.WRAP_CONTENT);
    RelativeLayout.LayoutParams myLabelParams   =  new RelativeLayout.LayoutParams(RelativeLayout.LayoutParams.WRAP_CONTENT, RelativeLayout.LayoutParams.WRAP_CONTENT);
    RelativeLayout.LayoutParams myValueParams   =  new RelativeLayout.LayoutParams(RelativeLayout.LayoutParams.WRAP_CONTENT, RelativeLayout.LayoutParams.WRAP_CONTENT);

    int seekBarId =  mySeekBar.getId();
    int labelId =  myLabel.getId();

    myLabelParams.addRule(RelativeLayout.BELOW,seekBarId);
    myValueParams.addRule(RelativeLayout.BELOW,seekBarId);
    myValueParams.addRule(RelativeLayout.RIGHT_OF,labelId);

    mySeekBar.setLayoutParams(mySeekBarParams);
    myLabel.setLayoutParams(myLabelParams);
    myValue.setLayoutParams(myValueParams);

    myLabel.setText(label);
    myValue.setText("hello");       
    mySeekBar.setOnSeekBarChangeListener(this);

    myLayout.addView(myLabel);
    myLayout.addView(myValue);
    myLayout.addView(mySeekBar);


    return myLayout;

}

 public void onProgressChanged(SeekBar seekBar, int progress, boolean fromTouch) {
    myValue.setText(progress);      
    //Amarino.sendDataToArduino(myContext, "00:11:11:21:05:53", 'A', progress);
 }
 public void onStopTrackingTouch(SeekBar seekBar){

 }
 public void onStartTrackingTouch (SeekBar seekBar){
 }


}

Answer 1

您正在將文本設置為一個 int，因此 Android 認為您正在嘗試通過 ID 引用資源。 將progress轉換為字符串應該可以解決您的問題。 例如Integer.toString(progress) 。