OnClickListener和textView设置文本

Question

I'm trying to dynamically set the text of my textView but I can't display neither the text nor the logcat message.

The app launch don't cause any errors. I've tried to use the onClick attribute in xml file instead of the click listener to launch a method that set the text but even so doesn't work,please help me.

Here's my code:

public class Anteprima extends Activity{

 TextView tx;
 Button button;
 ZoomControls zoom;


 @Override
 public void onCreate(Bundle savedInstanceState){
    super.onCreate(savedInstanceState);
    setContentView(R.layout.anteprima);
    tx = (TextView)findViewById(R.id.textView1);
    button = (Button)findViewById(R.id.button1);
    tx.setText("0000000");
    button.setOnClickListener(new OnClickListener(){

        @Override
        public void onClick(View v) {
             tx.setText("clickk");
            Log.i("anteprima ","click");

        }});
    targetPath = getIntent().getExtras().getString("target");
     contenutoPath = getIntent().getExtras().getString("contenuto");
    zoom = (ZoomControls)findViewById(R.id.zoomControls1);

    zoom.setIsZoomInEnabled(true);
    zoom.setIsZoomOutEnabled(true);

    zoom.setOnZoomInClickListener(new View.OnClickListener(){
        @Override
        public void onClick(View v) {
            tx.setText("piu");
        }

    });
    zoom.setOnZoomOutClickListener(new View.OnClickListener(){
        @Override
        public void onClick(View v) {
            tx.setText("meno");
        }
    });
     }
}

and here it is the layout

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" >

<Button
    android:id="@+id/button1"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_centerHorizontal="true"
    android:layout_centerVertical="true"
    android:text="Button"
     />

<ZoomControls
    android:id="@+id/zoomControls1"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_alignParentBottom="true"
    android:layout_centerHorizontal="true"
    android:layout_marginBottom="32dp" />

<TextView
    android:id="@+id/textView1"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_above="@+id/button1"
    android:layout_centerHorizontal="true"
    android:layout_marginBottom="38dp"
    android:textAppearance="?android:attr/textAppearanceLarge" />

</RelativeLayout>

this is the entire activity

package com.tesi.AR;




import com.metaio.sdk.ARViewActivity;
import com.metaio.sdk.jni.IGeometry;
import com.metaio.sdk.jni.IMetaioSDKCallback;


public class Anteprima extends ARViewActivity{

public IGeometry mVideo;
 String targetPath;
String contenutoPath;
String AR_FOLDER = "/mnt/sdcard/AR";
float scale = 1.0f;
TextView tx;
Button button;
ZoomControls zoom;
File xmlTemp;

@Override
public void onCreate(Bundle savedInstanceState){
     super.onCreate(savedInstanceState);
    setContentView(R.layout.anteprima);
    tx = (TextView)findViewById(R.id.textView1);
    button = (Button)findViewById(R.id.button1);
    tx.setText("0000000");
    button.setOnClickListener(new OnClickListener(){

        @Override
        public void onClick(View v) {
            tx.setText("clickk");
            Log.i("anteprima ","click");

        }});
    targetPath = getIntent().getExtras().getString("target");
    contenutoPath = getIntent().getExtras().getString("contenuto");
    zoom = (ZoomControls)findViewById(R.id.zoomControls1);

    zoom.setIsZoomInEnabled(true);
     zoom.setIsZoomOutEnabled(true);

    zoom.setOnZoomInClickListener(new View.OnClickListener(){
        @Override
        public void onClick(View v) {
            tx.setText("piu");
        }

    });
    zoom.setOnZoomOutClickListener(new View.OnClickListener(){
        @Override
         public void onClick(View v) {
            tx.setText("meno");
         }

    });

    Log.i("anteprima", targetPath);
    Log.i("anteprima", contenutoPath);

    //verifica esistenza dello spazio di memoria dedicato all'app
    File arFolder = new File(AR_FOLDER);
    File targetFolder = new File(arFolder, "Targets");
    File contenutiFolder = new File(arFolder, "Contenuti");

    if(!arFolder.exists()){
        Log.i("anteprima", "Cartella non trovata provvedo alla creazione");
        arFolder.mkdirs();
        arFolder.setReadable(true);
        Log.i("anteprima", "Cartella AR creata");
        targetFolder.mkdir(); 
        contenutiFolder.mkdir(); 
    } 
    File targetFakePathFile = new File(targetPath);
    File targetPathFile = new File (targetFolder,targetFakePathFile.getName());
    //provo a creare il nuovo file
    try { 
        targetPathFile.createNewFile();
    } catch (IOException e) { 
        // TODO Auto-generated catch block 
        e.printStackTrace(); 
    } 
    //Provo a copiare  il file target in targets folder
    try { 
        Utility.copyFile(targetFakePathFile, targetPathFile);
     } catch (Exception e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    }
     xmlTemp = new File(targetFolder,"temp.xml");
    //Creo il file di configurazione temporaneo
    try {
        xmlTemp.createNewFile();
    } catch (IOException e) {
        // TODO Auto-generated catch block
         e.printStackTrace();
    }
    TrackingConfigurationXML tcx = newTrackingConfigurationXML("Nome_Sensore");
    SensorCOS sc = new SensorCOS("idSensore",targetPathFile.getName());

    COS cos = new COS("cos1", "trackingId", sc);

    String xml =   tcx.toStringTheStartXML()+sc.toString()+tcx.toStringTheMiddleXML()+cos.toString()+tcx.toStr    ingTheEndXML();
    BufferedWriter buffWriter = null;
     //scrive sul file xml le impostazioni
    try {
        buffWriter = new BufferedWriter(new FileWriter(xmlTemp));
     } catch (IOException e) {
        // TODO Auto-generated catch block
         e.printStackTrace();
    }
    try {
        buffWriter.write(xml);
        buffWriter.close();
    } catch (IOException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
     }



}

@Override
protected int getGUILayout() {
    return R.layout.anteprima;
}

@Override
protected IMetaioSDKCallback getMetaioSDKCallbackHandler() {

    return null;
}

@Override
protected void loadContents() {
    String xmlPath = xmlTemp.getAbsolutePath();
    boolean result = metaioSDK.setTrackingConfiguration(xmlPath);
    Log.i("anteprima", "set tarcking conf = "+result);
    mVideo = metaioSDK.createGeometryFromMovie(contenutoPath);
    mVideo.startMovieTexture(true);

}
/*
@Override
public void onDrawFrame() {
    super.onDrawFrame();
    mVideo.setScale(scale);
}
*/
@Override
protected void onGeometryTouched(IGeometry geometry) {
    // TODO Auto-generated method stub

}

}

Answer 1

我刚刚运行了您的代码，它的工作正常……实际上，我也没有对您的代码做任何更改。。由于代码运行正常，您所面临的问题是什么。并且文本视图在Button单击时动态显示文本...