android--widget之menu
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1、布局
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" >
<TextView
android:id="@+id/menuview"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="@string/menuviewtext" />
<Button
android:id="@+id/menubutton1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="@string/menubuttontext1" />
<Button
android:id="@+id/menubutton2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="@string/menubuttontext2" />
</LinearLayout>
2、Activity
import android.app.Activity;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.Button;
public class MenuDemoActivity extends Activity {
private Button menuButton1;
private Button menuButton2;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.menulayout);
menuButton1 = (Button) findViewById(R.id.menubutton1);
menuButton2 = (Button) findViewById(R.id.menubutton2);
menuButton1.setVisibility(View.INVISIBLE);
menuButton2.setVisibility(View.INVISIBLE);
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
super.onCreateOptionsMenu(menu);
menu.add(0, 0, 0, R.string.menubuttontext1);
menu.add(1, 1, 1, R.string.menubuttontext2);
return true;
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
switch (item.getItemId()) {
case 0:
menuButton1.setVisibility(View.VISIBLE);
menuButton2.setVisibility(View.GONE);
break;
case 1:
menuButton1.setVisibility(View.GONE);
menuButton2.setVisibility(View.VISIBLE);
break;
}
return super.onOptionsItemSelected(item);
}
}
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