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android中的menu和子menu小结

晴儿成长记 2022-12-02 阅读 124

menu.xml 


<?xml version="1.0" encoding="utf-8"?>

<menu

xmlns:android="http://schemas.android.com/apk/res/android">

<item android:id="@+id/Menu1"

android:title="Menu 1"

android:orderInCategory="1" />

<item android:id="@+id/Menu2"

android:orderInCategory="2"

android:title="Menu 2" />

<item android:id="@+id/Menu3"

android:orderInCategory="3"

android:title="Menu 3" />

<item android:id="@+id/submenu"

android:title="Sub menu"

android:orderInCategory="4">

<menu>

<item android:id="@+id/submenu1"

android:title="Sub menu 1" />

<item android:id="@+id/submenu2"

android:title="Sub menu 2" />

</menu>

</item>

</menu>

public class MenuActivity extends Activity {

/** Called when the activity is first created. */

@Override

public void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.main);

}

public boolean onCreateOptionsMenu(Menu menu) {

new MenuInflater(getApplication())

.inflate(R.menu.menu, menu);

return(super.onPrepareOptionsMenu(menu));

}


public boolean onOptionsItemSelected(MenuItem item) {

switch (item.getItemId()) {

case R.id.Menu1:

Toast.makeText(this, "Menu 1", Toast.LENGTH_SHORT).show();

break;

case R.id.Menu2:

Toast.makeText(this, "Menu 2", Toast.LENGTH_SHORT).show();

break;

case R.id.Menu3:

Toast.makeText(this, "Menu 3", Toast.LENGTH_SHORT).show();

break;

case R.id.submenu:

Toast.makeText(this, "Sub menu", Toast.LENGTH_SHORT).show();

break;

}

return(super.onOptionsItemSelected(item));

}

}

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