问题描述
我正在尝试使用户能够停止并启动我正在从菜单中实现的服务，单击该菜单时文本将被更改，因此我想在菜单工具中添加ToggleButton作为选项，但没有任何帮助现在以我的情况显示.我该如何解决?
I am trying to enable the user to stops and starts service which I am implementing from the Menu where the text is will be changed when he clicks it so I want to add ToggleButton as option in the menu tool but nothing is being display in my case now. How can I fix it?
AndroidManifest.xml
<?xml version="1.0" encoding="utf-8"?>
<menu xmlns:android="http://schemas.android.com/apk/res/android" >
<ToggleButton
android:id="@+id/toggle"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textOff="Off"
android:textOn="On" />
</menu>
MainActivity:
public class MainActivity extends ActionBarActivity {
ToggleButton tButton;
@Override
public boolean onCreateOptionsMenu(Menu menu) {
MenuInflater inflater = getMenuInflater();
inflater.inflate(R.menu.main_menu, menu);
return true;
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
switch (item.getItemId()) {
case R.id.toggle:
tButton = (ToggleButton) findViewById(R.id.toggle);
tButton.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
if (((ToggleButton) v).isChecked()) {
Intent i = new Intent(MainActivity.this,
TrackingService.class);
startService(i);
System.out.println("test is checked, start service");
} else {
// Stop the service when the Menu button clicks.
Intent i = new Intent(MainActivity.this,
TrackingService.class);
stopService(i);
System.out.println("test is NOT checked, stop service");
}
}
});
return true;
default:
return false;
}
}
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
switch (item.getItemId()) {
case R.id.checkable_menu:
if (isChecked = !item.isChecked()) {
item.setChecked(isChecked);
Intent i = new Intent(this, TrackingService.class);
startService(i);
System.out.println("test if onOptionsItemSelected");
} else {
Intent i = new Intent(this, TrackingService.class);
stopService(i);
System.out.println("test else onOptionsItemSelected");
}
return true;
default:
System.out
.println("test default onOptionsItemSelected was invoked.");
return false;
}
}
推荐答案
如上所述，您不能在菜单中添加切换按钮.您可以使用菜单项中的android:checkable属性来处理这两种状态.
As mentioned above, you can't add toggle button to the menu. You can use the android:checkable property in your menu item to handle the two states.
类似的东西:
菜单:
<item
android:id="@+id/checkable_menu"
android:checkable="true"
android:title="@string/checkable" />
活动:
private boolean isChecked = false;
@Override
public boolean onPrepareOptionsMenu(Menu menu) {
MenuItem checkable = menu.findItem(R.id.checkable_menu);
checkable.setChecked(isChecked);
return true;
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
switch (item.getItemId()) {
case R.id.checkable_menu:
isChecked = !item.isChecked();
item.setChecked(isChecked);
return true;
default:
return false;
}
}
PS:从此处复制代码.
或，您只需在点击事件中更新项目图标，即可使用item.setIcon(yourDrawable));
Or you can just update your item icon on click event to show the two states with item.setIcon(yourDrawable));
这篇关于在菜单中添加切换按钮以停止和启动服务的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！