Java ComponentName类代码示例

import android.content.ComponentName; //导入依赖的package包/类
private void disableComponent() {
        PackageManager packageManager = getPackageManager();
        ComponentName componentName = new ComponentName(this, MainActivity.class);
//        packageManager.setComponentEnabledSetting(componentName, PackageManager.COMPONENT_ENABLED_STATE_DISABLED,
//                PackageManager.DONT_KILL_APP);
        int res = packageManager.getComponentEnabledSetting(componentName);
        if (res == PackageManager.COMPONENT_ENABLED_STATE_DEFAULT
                || res == PackageManager.COMPONENT_ENABLED_STATE_ENABLED) {
            // 隐藏应用图标
            packageManager.setComponentEnabledSetting(componentName, PackageManager.COMPONENT_ENABLED_STATE_DISABLED,
                    PackageManager.DONT_KILL_APP);
        } else {
            // 显示应用图标
            packageManager.setComponentEnabledSetting(componentName, PackageManager.COMPONENT_ENABLED_STATE_DEFAULT,
                    PackageManager.DONT_KILL_APP);
        }
    }
 

import android.content.ComponentName; //导入依赖的package包/类
public void openApplication(Context context, String packageName) {
    PackageInfo pi;
    try {
        pi = context.getPackageManager().getPackageInfo(packageName, 0);
    } catch (PackageManager.NameNotFoundException e) {
        pi = null;
        e.printStackTrace();
    }
    if (pi != null) {
        Intent resolveIntent = new Intent("android.intent.action.MAIN", null);
        resolveIntent.setPackage(pi.packageName);
        ResolveInfo ri = (ResolveInfo) context.getPackageManager().queryIntentActivities(resolveIntent, 0).iterator().next();
        if (ri != null) {
            packageName = ri.activityInfo.packageName;
            String className = ri.activityInfo.name;
            Intent intent = new Intent("android.intent.action.MAIN");
            intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
            intent.setComponent(new ComponentName(packageName, className));
            context.startActivity(intent);
        }
    }
}
 

import android.content.ComponentName; //导入依赖的package包/类
private boolean isAppIsInBackground(Context context) {
    boolean isInBackground = true;
    ActivityManager am = (ActivityManager) context.getSystemService(Context.ACTIVITY_SERVICE);
    if (Build.VERSION.SDK_INT > Build.VERSION_CODES.KITKAT_WATCH) {
        List<ActivityManager.RunningAppProcessInfo> runningProcesses = am.getRunningAppProcesses();
        for (ActivityManager.RunningAppProcessInfo processInfo : runningProcesses) {
            if (processInfo.importance == ActivityManager.RunningAppProcessInfo.IMPORTANCE_FOREGROUND) {
                for (String activeProcess : processInfo.pkgList) {
                    if (activeProcess.equals(context.getPackageName())) {
                        isInBackground = false;
                    }
                }
            }
        }
    } else {
        List<ActivityManager.RunningTaskInfo> taskInfo = am.getRunningTasks(1);
        ComponentName componentInfo = taskInfo.get(0).topActivity;
        if (componentInfo.getPackageName().equals(context.getPackageName())) {
            isInBackground = false;
        }
    }

    return isInBackground;
}
 

import android.content.ComponentName; //导入依赖的package包/类
/**
 * Obtain an {@link Intent} that will launch an explicit target activity specified by
 * this activity's logical parent. The logical parent is named in the application's manifest
 * by the {@link android.R.attr#parentActivityName parentActivityName} attribute.
 * Activity subclasses may override this method to modify the Intent returned by
 * super.getParentActivityIntent() or to implement a different mechanism of retrieving
 * the parent intent entirely.
 *
 * @return a new Intent targeting the defined parent of this activity or null if
 *         there is no valid parent.
 */
@Nullable
public Intent getParentActivityIntent() {
    final String parentName = mActivityInfo.parentActivityName;
    if (TextUtils.isEmpty(parentName)) {
        return null;
    }

    // If the parent itself has no parent, generate a main activity intent.
    final ComponentName target = new ComponentName(this, parentName);
    try {
        final ActivityInfo parentInfo = getPackageManager().getActivityInfo(target, 0);
        final String parentActivity = parentInfo.parentActivityName;
        final Intent parentIntent = parentActivity == null
                ? Intent.makeMainActivity(target)
                : new Intent().setComponent(target);
        return parentIntent;
    } catch (NameNotFoundException e) {
        Log.e(TAG, "getParentActivityIntent: bad parentActivityName '" + parentName +
                "' in manifest");
        return null;
    }
}
 

import android.content.ComponentName; //导入依赖的package包/类
/**
     * 切换桌面图标
     *
     * @param componentDisabledName
     * @param componentEnabledName
     */
    private void setComponentEnabled(ComponentName componentDisabledName
            , ComponentName componentEnabledName) {
        PackageManager pm = getPackageManager();
        pm.setComponentEnabledSetting(componentDisabledName, PackageManager.COMPONENT_ENABLED_STATE_DISABLED,
                PackageManager.DONT_KILL_APP);
        pm.setComponentEnabledSetting(componentEnabledName, PackageManager.COMPONENT_ENABLED_STATE_ENABLED,
                PackageManager.DONT_KILL_APP);
        snackBarShow(mCoordinatorLayout, getString(R.string.launcher_icon_had_change));
        // Find launcher and kill it (restart launcher)
        // MIUI8 Android6.0.6:android.content.pm.PackageManager$NameNotFoundException
//        ActivityManager am = (ActivityManager) getSystemService(Activity.ACTIVITY_SERVICE);
//        Intent i = new Intent(Intent.ACTION_MAIN);
//        i.addCategory(Intent.CATEGORY_HOME);
//        i.addCategory(Intent.CATEGORY_DEFAULT);
//        List<ResolveInfo> resolves = pm.queryIntentActivities(i, 0);
//        for (ResolveInfo res : resolves) {
//            if (res.activityInfo != null) {
//                am.killBackgroundProcesses(res.activityInfo.packageName);
//            }
//        }
    }
 

import android.content.ComponentName; //导入依赖的package包/类
private MediaSessionCompat createMediaSession() {
    MediaSessionCompat mediaSession = new MediaSessionCompat(
            mContext,
            mContext.getString(R.string.app_name),
            new ComponentName(mContext.getPackageName(),
                    getButtonReceiverClassName()),
            null);
    mediaSession.setFlags(MediaSessionCompat.FLAG_HANDLES_MEDIA_BUTTONS
            | MediaSessionCompat.FLAG_HANDLES_TRANSPORT_CONTROLS);
    mediaSession.setCallback(mMediaSessionCallback);

    // TODO(mlamouri): the following code is to work around a bug that hopefully
    // MediaSessionCompat will handle directly. see b/24051980.
    try {
        mediaSession.setActive(true);
    } catch (NullPointerException e) {
        // Some versions of KitKat do not support AudioManager.registerMediaButtonIntent
        // with a PendingIntent. They will throw a NullPointerException, in which case
        // they should be able to activate a MediaSessionCompat with only transport
        // controls.
        mediaSession.setActive(false);
        mediaSession.setFlags(MediaSessionCompat.FLAG_HANDLES_TRANSPORT_CONTROLS);
        mediaSession.setActive(true);
    }
    return mediaSession;
}
 

import android.content.ComponentName; //导入依赖的package包/类
/**
 * Dismiss the Keyboard Shortcuts screen.
 */
public final void dismissKeyboardShortcutsHelper() {
    Intent intent = new Intent(Intent.ACTION_DISMISS_KEYBOARD_SHORTCUTS);
    intent.setComponent(new ComponentName(KEYBOARD_SHORTCUTS_RECEIVER_PKG_NAME,
            KEYBOARD_SHORTCUTS_RECEIVER_CLASS_NAME));
    sendBroadcast(intent);
}
 

import android.content.ComponentName; //导入依赖的package包/类
@Override
public void showFileContent(ActivityInfo activityInfo, File file,
                            int requestCode) throws AppChooserException {
    Intent intent = new Intent(Intent.ACTION_VIEW);
    intent.setComponent(new ComponentName(activityInfo.getPkg(), activityInfo.getCls()));
    intent.setDataAndType(Uri.fromFile(file), activityInfo.getMimeType());
    ComponentName componentName = intent.resolveActivity(getActivity().getPackageManager());
    if (componentName != null) {
        try {
            if (requestCode == ResolversConsts.DEFAULT_REQUEST_CODE) {
                getActivity().startActivity(intent);
            } else {
                getActivity().startActivityForResult(intent, requestCode);
            }
        } catch (ActivityNotFoundException e) {
            throw new AppChooserException(e);
        }
    } else {
        throw new AppChooserException();
    }
}
 

import android.content.ComponentName; //导入依赖的package包/类
/**
 * 根据包名打开第三方应用
 *
 * @param context
 * @param packageName
 * @throws PackageManager.NameNotFoundException
 */
public static void openAppByPackageName(Context context, String packageName) throws PackageManager.NameNotFoundException {
    PackageInfo pi;
    try {
        pi = MyApplication.getContext().getPackageManager().getPackageInfo(packageName, 0);
        Intent resolveIntent = new Intent(Intent.ACTION_MAIN, null);
        resolveIntent.setPackage(pi.packageName);
        PackageManager pManager = MyApplication.getContext().getPackageManager();
        List<ResolveInfo> apps = pManager.queryIntentActivities(resolveIntent, 0);
        ResolveInfo ri = apps.iterator().next();
        if (ri != null) {
            packageName = ri.activityInfo.packageName;
            String className = ri.activityInfo.name;
            Intent intent = new Intent(Intent.ACTION_MAIN);
            intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK | Intent.FLAG_ACTIVITY_RESET_TASK_IF_NEEDED);//重点是加这个
            ComponentName cn = new ComponentName(packageName, className);
            intent.setComponent(cn);
            context.startActivity(intent);
        }
    } catch (PackageManager.NameNotFoundException e) {
        e.printStackTrace();
    }
}
 

import android.content.ComponentName; //导入依赖的package包/类
public LauncherAppWidgetInfo(int appWidgetId, ComponentName providerName) {
    if (appWidgetId == CUSTOM_WIDGET_ID) {
        itemType = LauncherSettings.Favorites.ITEM_TYPE_CUSTOM_APPWIDGET;
    } else {
        itemType = LauncherSettings.Favorites.ITEM_TYPE_APPWIDGET;
    }

    this.appWidgetId = appWidgetId;
    this.providerName = providerName;

    // Since the widget isn't instantiated yet, we don't know these values. Set them to -1
    // to indicate that they should be calculated based on the layout and minWidth/minHeight
    spanX = -1;
    spanY = -1;
    // We only support app widgets on current user.
    user = Process.myUserHandle();
    restoreStatus = RESTORE_COMPLETED;
}
 

import android.content.ComponentName; //导入依赖的package包/类
/**
 * Request the Keyboard Shortcuts screen to show up. This will trigger
 * {@link #onProvideKeyboardShortcuts} to retrieve the shortcuts for the foreground activity.
 */
public final void requestShowKeyboardShortcuts() {
    Intent intent = new Intent(Intent.ACTION_SHOW_KEYBOARD_SHORTCUTS);
    intent.setComponent(new ComponentName(KEYBOARD_SHORTCUTS_RECEIVER_PKG_NAME,
            KEYBOARD_SHORTCUTS_RECEIVER_CLASS_NAME));
    sendBroadcast(intent);
}
 

import android.content.ComponentName; //导入依赖的package包/类
/**
 * Method checks if the app is in background or not
 */
public static boolean isAppIsInBackground(Context context) {
    boolean isInBackground = true;
    ActivityManager am = (ActivityManager) context.getSystemService(Context.ACTIVITY_SERVICE);
    if (Build.VERSION.SDK_INT > Build.VERSION_CODES.KITKAT_WATCH) {
        List<ActivityManager.RunningAppProcessInfo> runningProcesses = am.getRunningAppProcesses();
        for (ActivityManager.RunningAppProcessInfo processInfo : runningProcesses) {
            if (processInfo.importance == ActivityManager.RunningAppProcessInfo.IMPORTANCE_FOREGROUND) {
                for (String activeProcess : processInfo.pkgList) {
                    if (activeProcess.equals(context.getPackageName())) {
                        isInBackground = false;
                    }
                }
            }
        }
    } else {
        List<ActivityManager.RunningTaskInfo> taskInfo = am.getRunningTasks(1);
        ComponentName componentInfo = taskInfo.get(0).topActivity;
        if (componentInfo.getPackageName().equals(context.getPackageName())) {
            isInBackground = false;
        }
    }

    return isInBackground;
}
 

import android.content.ComponentName; //导入依赖的package包/类
public void onAppPicked(ResolveInfo info) {
    final Intent intent = new Intent(getIntent());
    intent.setFlags(intent.getFlags() & ~Intent.FLAG_ACTIVITY_FORWARD_RESULT);
    intent.setComponent(new ComponentName(
            info.activityInfo.applicationInfo.packageName, info.activityInfo.name));
    startActivityForResult(intent, CODE_FORWARD);
}
 

import android.content.ComponentName; //导入依赖的package包/类
@Override
public void onClick(View view) {
    int i = view.getId();
    if (i == R.id.gprsACBtn) {
        context.startActivity(new Intent(Settings.ACTION_DATA_ROAMING_SETTINGS)
                .addCategory(Intent.ACTION_MAIN)
                .setComponent(new ComponentName("com.android.settings"
                        , "com.android.settings.Settings$DataUsageSummaryActivity"))
                .setFlags(Intent.FLAG_ACTIVITY_NEW_TASK));
        dismiss();
    } else if (i == R.id.wifiACBtn) {
        context.startActivity(new Intent(Settings.ACTION_WIFI_SETTINGS));
        dismiss();
    }
}
 

import android.content.ComponentName; //导入依赖的package包/类
@Override
public void onAttach(Activity activity) {
    logd("onAttach(%s)", activity.getClass().getSimpleName());
    super.onAttach(activity);
    mContext = activity;
    mPm = mContext.getPackageManager();
    mNoMan = INotificationManager.Stub.asInterface(
            ServiceManager.getService(Context.NOTIFICATION_SERVICE));
    try {
        mListener.registerAsSystemService(mContext, new ComponentName(mContext.getPackageName(),
                this.getClass().getCanonicalName()), ActivityManager.getCurrentUser());
    } catch (RemoteException e) {
        Log.e(TAG, "Cannot register listener", e);
    }
}