Créer une vue personnalisé
Bonjour ,
j'aimerais créer une vue personnalisé mais étant débutant sous android je ne comprends pas trop comment l'instancier à partir de mon activité main.
Voici mon code dans mon activité main :
Code:
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| package com.example.trajet;
import android.os.Bundle;
import android.app.Activity;
import android.view.Menu;
import android.view.View;
import android.view.View.OnClickListener;
import android.content.Intent;
import android.widget.Button;
public class MainActivity extends Activity implements OnClickListener{
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Button boutonExercice = (Button)findViewById(R.id.exerciceButton);
Button boutonQuitter = (Button)findViewById(R.id.quitterButton);
boutonExercice.setOnClickListener(this);
boutonQuitter.setOnClickListener(this);
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
getMenuInflater().inflate(R.menu.activity_main, menu);
return true;
}
@Override
public void onStart(){
super.onStart();
System.out.println("je me lance start !");
}
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
switch(v.getId()){
case R.id.exerciceButton:
startActivity(new Intent(this, MaVue.class));
break;
case R.id.quitterButton:
System.exit(0);
break;
}
}
} |
Voici mon code dans ma classe vue :
Code:
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| package com.example.trajet;
import android.content.Context;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.graphics.Point;
import android.util.AttributeSet;
import android.view.MotionEvent;
import android.view.View;
public class MaVue extends View {
public MaVue ( Context context ) {
super ( context );
}
protected void onDraw(Canvas canvas) {
super.onDraw(canvas);
Point pt1 = null;
Point pt2 = null;
Paint paint = new Paint ();
paint.setColor (Color.DKGRAY);
paint.setStrokeWidth (2);
canvas.drawLine(pt1 .x, pt1 .y, pt2 .x, pt2 .y, paint);
}
public MaVue(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
// TODO Auto-generated constructor stub
}
public MaVue(Context context, AttributeSet attrs) {
super(context, attrs);
// TODO Auto-generated constructor stub
}
public boolean onTouchEvent(MotionEvent event) {
return super.onTouchEvent ( event );
}
} |
voici le code dans mon ma_vue.xml :
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| <?xml version ="1.0" encoding ="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width ="fill_parent"
android:layout_height ="fill_parent"
android:gravity ="center_horizontal|center_vertical"
android:orientation ="vertical" >
<com.example.trajet
android:id ="@+id/mavue"
android:layout_height ="fill_parent"
android:layout_width ="fill_parent" />
</LinearLayout> |
Et pour finir voici mon code dans mon manifest.xml :
Code:
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| <manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.trajet"
android:versionCode="1"
android:versionName="1.0" >
<uses-sdk
android:minSdkVersion="8"
android:targetSdkVersion="15" />
<application
android:icon="@drawable/ic_launcher"
android:label="@string/app_name"
android:theme="@style/AppTheme" >
<activity
android:name=".MainActivity"
android:label="@string/title_activity_main" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<activity
android:name=".MaVue"
android:label="@string/exercice_titre"
>
</activity>
</application>
</manifest> |
Mon erreur quand j'execute est :
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| 11-10 09:25:04.206: I/System.out(631): je me lance start !
11-10 09:25:06.165: D/dalvikvm(631): newInstance failed: no <init>()
11-10 09:25:06.165: D/AndroidRuntime(631): Shutting down VM
11-10 09:25:06.176: W/dalvikvm(631): threadid=1: thread exiting with uncaught exception (group=0x40014760)
11-10 09:25:06.185: E/AndroidRuntime(631): FATAL EXCEPTION: main
11-10 09:25:06.185: E/AndroidRuntime(631): java.lang.RuntimeException: Unable to instantiate activity ComponentInfo{com.example.trajet/com.example.trajet.MaVue}: java.lang.InstantiationException: com.example.trajet.MaVue
11-10 09:25:06.185: E/AndroidRuntime(631): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1739)
11-10 09:25:06.185: E/AndroidRuntime(631): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1831)
11-10 09:25:06.185: E/AndroidRuntime(631): at android.app.ActivityThread.access$500(ActivityThread.java:122)
11-10 09:25:06.185: E/AndroidRuntime(631): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1024)
11-10 09:25:06.185: E/AndroidRuntime(631): at android.os.Handler.dispatchMessage(Handler.java:99)
11-10 09:25:06.185: E/AndroidRuntime(631): at android.os.Looper.loop(Looper.java:132)
11-10 09:25:06.185: E/AndroidRuntime(631): at android.app.ActivityThread.main(ActivityThread.java:4123)
11-10 09:25:06.185: E/AndroidRuntime(631): at java.lang.reflect.Method.invokeNative(Native Method)
11-10 09:25:06.185: E/AndroidRuntime(631): at java.lang.reflect.Method.invoke(Method.java:491)
11-10 09:25:06.185: E/AndroidRuntime(631): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:841)
11-10 09:25:06.185: E/AndroidRuntime(631): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:599)
11-10 09:25:06.185: E/AndroidRuntime(631): at dalvik.system.NativeStart.main(Native Method)
11-10 09:25:06.185: E/AndroidRuntime(631): Caused by: java.lang.InstantiationException: com.example.trajet.MaVue
11-10 09:25:06.185: E/AndroidRuntime(631): at java.lang.Class.newInstanceImpl(Native Method)
11-10 09:25:06.185: E/AndroidRuntime(631): at java.lang.Class.newInstance(Class.java:1301)
11-10 09:25:06.185: E/AndroidRuntime(631): at android.app.Instrumentation.newActivity(Instrumentation.java:1022)
11-10 09:25:06.185: E/AndroidRuntime(631): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1730)
11-10 09:25:06.185: E/AndroidRuntime(631): ... 11 more |
Pouvez vous m'aider svp :cry:
