将切换按钮添加到菜单以停止并启动服务

Question

我试图让用户停止并启动我正在从菜单实现的服务,当他点击它时文本将被更改,所以我想ToggleButton在菜单工具中添加选项,但现在我的案例中没有显示任何内容.我该如何解决？

AndroidManifest.xml中

<?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>

主要活动:

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;
        }
    }
}

编辑:

@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;
    }
}

Answer 1

太迟了回复!

这很容易.相反,您将在工具栏上显示切换按钮.

<item
    android:id="@+id/show_secure"
    android:enabled="true"
    android:title=""
    android:visible="true"
    app:actionLayout="@layout/show_protected_switch"
    app:showAsAction="ifRoom" />

这是您的show_protected_switch.xml布局.

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="wrap_content"
android:layout_height="wrap_content">

<ToggleButton
    android:id="@+id/switch_show_protected"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:background="@drawable/switch_ptotected_btn_selector"
    android:textOff=""
    android:textOn=""/>
 </RelativeLayout>

在代码中:

 ToggleButton mSwitchShowSecure;
 mSwitchShowSecure = (ToggleButton) menu.findItem(R.id.show_secure).getActionView().findViewById(R.id.switch_show_protected);
        mSwitchShowSecure.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
            @Override
            public void onCheckedChanged(CompoundButton compoundButton, boolean b) {
                if(b){
                    //Your code when checked

                } else {
                    //Your code when unchecked
                }Y
            }
        });

输出!

它相当大,但显然你可以调整它的大小

Answer 2

如上所述,您无法在菜单中添加切换按钮.您可以使用android:checkable菜单项中的属性来处理这两种状态.

就像是:

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:从这里复制代码.

或者您可以在点击事件上更新项目图标以显示两个状态item.setIcon(yourDrawable));

Answer 3

我知道很长一段时间发布答案,但它可能有助于某人:)

我跟着这个链接并更新了一些实现的解决方案,因为在这些修改之前应用程序崩溃了

以下是完整的解决方案:1-在layout文件夹下创建一个新的xml文件,并将其命名为switch_layout.xml并将其放在下面:

<?xml version="1.0" encoding="utf-8"?>
    <RelativeLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="match_parent"
    android:orientation="horizontal" >
    <Switch
        android:id="@+id/switchAB"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_centerHorizontal="true"
        android:layout_centerVertical="true" />
</RelativeLayout>

2-在菜单文件夹下的main.xml文件中添加以下菜单项:

<item
    android:id="@+id/switchId"
    android:title=""
    android:actionLayout="@layout/switch_layout"
    app:showAsAction="always" />

3-转到您的活动,以下是onCreateOptionsMenu方法的完整实现:

 @Override
public boolean onCreateOptionsMenu(Menu menu) {
    // Inflate the menu; this adds items to the action bar if it is present.
    getMenuInflater().inflate(R.menu.main, menu);
    MenuItem item = (MenuItem) menu.findItem(R.id.switchId);
    item.setActionView(R.layout.switch_layout);
    Switch switchAB = item
            .getActionView().findViewById(R.id.switchAB);
    switchAB.setChecked(false);

    switchAB.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
        @Override
        public void onCheckedChanged(CompoundButton buttonView,
                                     boolean isChecked) {
            if (isChecked) {
                Toast.makeText(getApplication(), "ON", Toast.LENGTH_SHORT)
                        .show();
            } else {
                Toast.makeText(getApplication(), "OFF", Toast.LENGTH_SHORT)
                        .show();
            }
        }
    });
    return true;
}