演示从一个Activity切换到另外的一个Activity.
第一个Activity
ActivitySecond.java代码
import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
public class ActivitySecond extends Activity
{
private Button btn2;
private Button btnClose;
@Override
protected void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.second_activity);
btn2 = (Button) findViewById(R.id.btn_back);
btn2.setOnClickListener(new OnClickListener()
{
public void onClick(View v)
{
Intent intent = new Intent();
intent.setClass(ActivitySecond.this, ActivityChange.class);
startActivity(intent);
//如果不关闭当前的会出现好多个页面
ActivitySecond.this.finish();
}
});
btnClose = (Button) findViewById(R.id.btn_close);
btnClose.setOnClickListener(new OnClickListener()
{
public void onClick(View v)
{
finish();
}
});
}
}
ActivityChange.java代码
import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
public class ActivityChange extends Activity {
private Button btn;
private Button btnClose;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
btn=(Button)findViewById(R.id.btnNextView);
btn.setOnClickListener(new OnClickListener()
{
public void onClick(View v)
{
Intent itent=new Intent();
itent.setClass(ActivityChange.this, ActivitySecond.class);
startActivity(itent);
ActivityChange.this.finish();
}
});
btnClose=(Button)findViewById(R.id.btn_exit);
btnClose.setOnClickListener(new OnClickListener()
{
public void onClick(View v)
{
finish();
}
});
}
}
![](https://images.cnblogs.com/OutliningIndicators/ContractedBlock.gif)
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
>
<TextView
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="@string/hello"
/>
<Button
android:id="@+id/btnNextView"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="@string/show_next"
/>
<Button
android:id="@+id/btn_exit"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="@string/btn_close"
/>
</LinearLayout>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
>
<TextView
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="@string/hello"
/>
<Button
android:id="@+id/btnNextView"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="@string/show_next"
/>
<Button
android:id="@+id/btn_exit"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="@string/btn_close"
/>
</LinearLayout>
second_activity.xml代码
![](https://images.cnblogs.com/OutliningIndicators/ContractedBlock.gif)
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="activity.change"
android:versionCode="1"
android:versionName="1.0">
<application android:icon="@drawable/icon" android:label="@string/app_name">
<activity android:name=".ActivityChange"
android:label="@string/app_name">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<activity
android:name="ActivitySecond"
/>
</application>
</manifest>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="activity.change"
android:versionCode="1"
android:versionName="1.0">
<application android:icon="@drawable/icon" android:label="@string/app_name">
<activity android:name=".ActivityChange"
android:label="@string/app_name">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<activity
android:name="ActivitySecond"
/>
</application>
</manifest>