第一个Activity
package personal.practice.practice01;import android.app.Activity;
import android.content.DialogInterface;
import android.content.DialogInterface.OnClickListener;
import android.content.Intent;
import android.os.Bundle;
import android.widget.Button;
import android.widget.TextView;public class firstActivity extends Activity {
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
TextView myTextView = (TextView) findViewById(R.id.myTextView);
Button myButton = (Button) findViewById(R.id.myButton);
myTextView.setText("文本视图:这是第1个Activity!");
myButton.setText("按钮");
myButton.setOnClickListener((android.view.View.OnClickListener) new MyButtonListener());
}
class MyButtonListener implements OnClickListener{ @Override
public void onClick(DialogInterface dialog, int which) {
// TODO Auto-generated method stub
Intent intent =new Intent();
intent.setClass(firstActivity.this, OtherActivity.class);
startActivity(intent);
}
}
}
package personal.practice.practice01;import android.app.Activity;
import android.content.DialogInterface;
import android.content.DialogInterface.OnClickListener;
import android.content.Intent;
import android.os.Bundle;
import android.widget.Button;
import android.widget.TextView;public class firstActivity extends Activity {
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
TextView myTextView = (TextView) findViewById(R.id.myTextView);
Button myButton = (Button) findViewById(R.id.myButton);
myTextView.setText("文本视图:这是第1个Activity!");
myButton.setText("按钮");
myButton.setOnClickListener((android.view.View.OnClickListener) new MyButtonListener());
}
class MyButtonListener implements OnClickListener{ @Override
public void onClick(DialogInterface dialog, int which) {
// TODO Auto-generated method stub
Intent intent =new Intent();
intent.setClass(firstActivity.this, OtherActivity.class);
startActivity(intent);
}
}
}
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package personal.practice.practice01;import android.app.Activity;
import android.os.Bundle;
import android.widget.TextView;public class OtherActivity extends Activity{
private TextView myTextView = null;
@Override
protected void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
setContentView(R.layout.other);
myTextView =(TextView)findViewById(R.id.myOtherTextView);
}
}
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="personal.practice.practice01"
android:versionCode="1"
android:versionName="1.0" > <uses-sdk android:minSdkVersion="4" /> <application
android:icon="@drawable/ic_launcher"
android:label="@string/app_name" >
<activity
android:label="@string/app_name"
android:name=".firstActivity" >
<intent-filter >
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<activity
android:name=".OtherActivity"
android:label="@string/app_name"
/> </application></manifest>
import android.content.DialogInterface.OnClickListener;listener用错了,应该实现这个android.view.View.OnClickListener
是实现,不是强制转型