如何在android中手动停止BroadcastReceiver

Question

我已经在 AndroidManifest.xml 中注册了我的 BroadcastReceiver，如下所示

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
  package="com.example" android:versionCode="1" android:versionName="1.0">
  <application android:icon="@drawable/icon" android:label="@string/app_name"
    android:theme="@android:style/Theme.Light">
    <activity android:name=".WiFiDemo" android:label="@string/app_name">
      <intent-filter>
        <action android:name="android.intent.action.MAIN" />
        <category android:name="android.intent.category.LAUNCHER" />
      </intent-filter>
    </activity>
    <receiver android:name="com.example.WiFiScanReceiver">
      <intent-filter>
        <action android:name="android.net.wifi.supplicant.CONNECTION_CHANGE" />
      </intent-filter>
    </receiver>
  </application>
  <uses-sdk android:minSdkVersion="3" />
  <uses-permission android:name="android.permission.ACCESS_WIFI_STATE"></uses-permission>
  <uses-permission android:name="android.permission.CHANGE_WIFI_STATE"></uses-permission>
 <uses-permission android:name="android.permission.UPDATE_DEVICE_STATS"></uses-permission>
 <uses-permission android:name="android.permission.CHANGE_NETWORK_STATE"> </uses-permission>
 <uses-permission android:name="android.permission.WAKE_LOCK"></uses-permission>
<uses-permission android:name="android.permission.INTERNET" />
</manifest>

我想使用其他应用程序输入来停止此 BroadcastReceiver 如何以编程方式停止此接收器？

这是我的接收器代码：

public class WIFIBroadcastReceiver extends BroadcastReceiver {

    @Override
    public void onReceive(Context context, Intent intent) {
        if (intent.getAction()
                .equals(WifiManager.SCAN_RESULTS_AVAILABLE_ACTION)) {
            Intent ssIntent = new Intent(context, com.Activity.class);
            ssIntent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
            context.startActivity(ssIntent);
        }
    }
}

Answer:: 我添加了共享首选项复选框并保存两个字符串并在接收方法中进行验证 这是我的代码

第二个应用程序：

final CheckBoxPreference checkboxPref = (CheckBoxPreference) getPreferenceManager()
        .findPreference("checkboxPref");
// ...
checkboxPref
        .setOnPreferenceChangeListener(new Preference.OnPreferenceChangeListener() {

            public boolean onPreferenceChange(Preference preference,
                    Object newValue) {
                if (newValue.toString().equals("true")) {
                    // String value = sp.getString(key, null);
                    sharedPreferences = getSharedPreferences(
                            PREFS_READ, Context.MODE_WORLD_READABLE);
                    Editor prefsPrivateEditor = sharedPreferences.edit();
                    prefsPrivateEditor.putString(KEY_READ1, "true");
                    prefsPrivateEditor.commit();
                    Toast.makeText(getApplicationContext(),
                            "CB: " + "true", Toast.LENGTH_SHORT).show();
                } else {
                    sharedPreferences = getSharedPreferences(
                            PREFS_READ, Context.MODE_WORLD_READABLE);
                    Editor prefsPrivateEditor = sharedPreferences.edit();
                    prefsPrivateEditor.putString(KEY_READ1, "false");
                    prefsPrivateEditor.commit();
                    Toast.makeText(getApplicationContext(),
                            "CB: " + "false", Toast.LENGTH_SHORT)
                            .show();
                }
                return true;
            }
        });

在 onReceive 方法内验证第一个应用程序中的代码：

public class WIFIBroadcastReceiver extends BroadcastReceiver {

    @Override
    public void onReceive(Context context, Intent intent) {
        if (intent.getAction()
                .equals(WifiManager.SCAN_RESULTS_AVAILABLE_ACTION)) {
            sharedPreferences = otherAppsContext.getSharedPreferences(
                    PREFS_READ, Context.MODE_WORLD_WRITEABLE);
            String scaningAction = sharedPreferences.getString(KEY_READ1, null);
            if (scaningAction.equals("true")) {
                Intent ssIntent = new Intent(context, com.Activity.class);
                ssIntent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
                context.startActivity(ssIntent);
            }
        }
    }
}

这是我的需要。但我无法注销广播接收器。如果没有任何活动，这个答案将对某人有所帮助。

Answer 1

您可以使用此方法：

ComponentName receiver = new ComponentName(context, myReceiver.class);

PackageManager pm = context.getPackageManager();

pm.setComponentEnabledSetting(receiver,
        PackageManager.COMPONENT_ENABLED_STATE_ENABLED,
        PackageManager.DONT_KILL_APP)

有关详细信息，请访问此处。

Answer 2

像这样：

PackageManager pm = getPackageManager();
pm.setComponentEnabledSetting(WiFiScanReceiver,
                            PackageManager.COMPONENT_ENABLED_STATE_DISABLED,
                            PackageManager.DONT_KILL_APP);

Answer 3

大多数情况下，您必须在 onResume() 方法中注册 BroadCastReceiver，因为它是 Activity 的运行状态。我们可以在 Activity 的 onPause()（即 Activity 的 Stopped State）中取消注册它。您可以从 广播接收器 阅读更多相关信息

Answer 4

我猜想具有偏好的代码位于某些偏好活动中。因此，让您的接收器保持原来的样子，并使用类似的内容：

public class YourSettingsActivity extends PreferenceActivity {

    OnPreferenceChangeListener onPreferenceChangeListener;

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        onPreferenceChangeListener = new OnPreferenceChangeListener() {

            public boolean onPreferenceChange(Preference preference,
                    Object newValue) {
                if (newValue instanceof Boolean) {
                    final boolean enable = (Boolean) newValue;
                    PackageManager pacman = getPackageManager();
                    final ComponentName componentName = new ComponentName(
                            "com.example.yourapp1", WIFIBroadcastReceiver.class);
                    final int state = (enable) ? PackageManager.COMPONENT_ENABLED_STATE_ENABLED
                            : PackageManager.COMPONENT_ENABLED_STATE_DISABLED;
                    pacman.setComponentEnabledSetting(componentName, state,
                            PackageManager.DONT_KILL_APP);
                    Toast.makeText(getApplicationContext(), "CB: " + enable,
                            Toast.LENGTH_SHORT).show();
                    return true;
                }
                return false;
            }
        };
        @SuppressWarnings("deprecation")
        final CheckBoxPreference checkboxPref = (CheckBoxPreference) getPreferenceManager()
                .findPreference("checkboxPref");
        checkboxPref.setOnPreferenceChangeListener(onPreferenceChangeListener);
    }
}

您可能会遇到安全异常 - 请参阅此处添加权限：

<!-- Allows an application to change whether an application component (other than
      its own) is enabled or not. -->
<permission android:name="android.permission.CHANGE_COMPONENT_ENABLED_STATE"
    android:label="@string/permlab_changeComponentState"
    android:description="@string/permdesc_changeComponentState"
    android:protectionLevel="signatureOrSystem" />

另外，您在排队时必须小心：

final ComponentName componentName = new ComponentName(
                            "com.example.yourapp1", WIFIBroadcastReceiver.class);

如果这解决了问题，请回帖