android.content.ComponentName#getPackageName ( )源码实例Demo

public boolean appHasCustomLabel(ComponentName appname) {
    String actvname = appname.getClassName();
    String pkgname =  appname.getPackageName();

    SQLiteDatabase db = this.getReadableDatabase();
    Cursor cursor = db.query(APP_TABLE, new String [] {CUSTOMLABEL}, ACTVNAME + "=? and " + PKGNAME + "=?", new String[]{actvname, pkgname}, null, null, null);
    try {
        if (cursor.moveToNext()) { //ACTVNAME, PKGNAME, LABEL, CATID
            String customlabel = cursor.getString(cursor.getColumnIndex(CUSTOMLABEL));
            if (customlabel!=null && !customlabel.isEmpty()) {
                return true;
            }
        }
    } finally {
        cursor.close();
    }
    return false;
}
 

public void deleteApp(ComponentName appname) {

        String actvname = appname.getClassName();

        String pkgname = appname.getPackageName();

        try {
            AppLauncher app = getApp(appname);
            if (app != null && (app.isLink() || app.isWidget())) {
                SQLiteDatabase db = this.getWritableDatabase();

                db.delete(APP_TABLE, ACTVNAME + "=? and " + PKGNAME + "=?", new String[]{actvname, pkgname});
                AppLauncher.removeAppLauncher(actvname,pkgname);

                return;
            }
        } catch (Exception e) {
            Log.e("LaunchDB", "Can't delete app " + actvname, e);
        }


        deleteApp(actvname, pkgname);
    }
 

private boolean extractCallerAuthDomain() {
    ComponentName callingActivity = getCallingActivity();
    if (callingActivity == null) {
        Log.w(LOG_TAG, "No calling activity found for save call");
        return false;
    }

    String callingPackage = callingActivity.getPackageName();
    AuthenticationDomain authDomain =
            AuthenticationDomain.fromPackageName(this, callingPackage);

    if (null == authDomain) {
        return false;
    }

    mCallerAuthDomain = authDomain;
    return true;
}
 

private int verifySessionsRequest(ComponentName componentName, int userId, final int pid,
        final int uid) {
    String packageName = null;
    if (componentName != null) {
        // If they gave us a component name verify they own the
        // package
        packageName = componentName.getPackageName();
        enforcePackageName(packageName, uid);
    }
    // Check that they can make calls on behalf of the user and
    // get the final user id
    int resolvedUserId = ActivityManager.handleIncomingUser(pid, uid, userId,
            true /* allowAll */, true /* requireFull */, "getSessions", packageName);
    // Check if they have the permissions or their component is
    // enabled for the user they're calling from.
    enforceMediaPermissions(componentName, pid, uid, resolvedUserId);
    return resolvedUserId;
}
 

/**
 * Used by: plugin EditActivity.
 *
 * Description as above.
 *
 * This version also includes backwards compatibility with pre 4.2 Tasker versions.
 * At some point this function will be deprecated.
 *
 * @param  editActivity the plugin edit activity, needed to test calling Tasker version
 * @see #setVariableReplaceKeys(Bundle, String[])
 */

public static boolean hostSupportsOnFireVariableReplacement( Activity editActivity ) {

    boolean supportedFlag = hostSupportsOnFireVariableReplacement( editActivity.getIntent().getExtras() );

    if ( ! supportedFlag ) {

        ComponentName callingActivity = editActivity.getCallingActivity();

        if ( callingActivity == null )
            Log.w( TAG, "hostSupportsOnFireVariableReplacement: null callingActivity, defaulting to false" );
        else {
            String callerPackage = callingActivity.getPackageName();

            // Tasker only supporteed this from 1.0.10
            supportedFlag =
                    ( callerPackage.startsWith( BASE_KEY ) ) &&
                            ( getPackageVersionCode( editActivity.getPackageManager(), callerPackage ) > FIRST_ON_FIRE_VARIABLES_TASKER_VERSION )
            ;
        }
    }

    return supportedFlag;
}
 

@Override
public int schedule(JobInfo job) throws RemoteException {
    int vuid = VBinder.getCallingUid();
    int id = job.getId();
    ComponentName service = job.getService();
    JobId jobId = new JobId(vuid, service.getPackageName(), id);
    JobConfig config = mJobStore.get(jobId);
    if (config == null) {
        config = new JobConfig(mGlobalJobId++, service.getClassName(), job.getExtras());
        mJobStore.put(jobId, config);
    } else {
        config.serviceName = service.getClassName();
        config.extras = job.getExtras();
    }
    saveJobs();
    mirror.android.app.job.JobInfo.jobId.set(job, config.virtualJobId);
    mirror.android.app.job.JobInfo.service.set(job, mJobProxyComponent);
    return mScheduler.schedule(job);
}
 

private static int getProcessByComponentName(ComponentName cn) {
    if (cn == null) {
        // 如果Intent里面没有带ComponentName，则我们不支持此特性，直接返回null
        // 外界会直接调用其系统的对应方法
        return PROCESS_UNKNOWN;
    }
    String pn = cn.getPackageName();
    // 开始尝试获取插件的ServiceInfo
    ComponentList col = PluginFactory.queryPluginComponentList(pn);
    if (col == null) {
        if (LogDebug.LOG) {
            Log.e(TAG, "getProcessByComponentName(): Fetch Component List Error! pn=" + pn);
        }
        return PROCESS_UNKNOWN;
    }
    ServiceInfo si = col.getService(cn.getClassName());
    if (si == null) {
        if (LogDebug.LOG) {
            Log.e(TAG, "getProcessByComponentName(): Not register! pn=" + pn);
        }
        return PROCESS_UNKNOWN;
    }
    int p = PluginClientHelper.getProcessInt(si.processName);
    if (LogDebug.LOG) {
        Log.d(TAG, "getProcessByComponentName(): Okay! Process=" + p + "; pn=" + pn);
    }
    return p;
}
 

/**
 * 开启一个插件的Activity <p>
 * 其中Intent的ComponentName的Key应为插件名（而不是包名），可使用createIntent方法来创建Intent对象
 *
 * @param context Context对象
 * @param intent  要打开Activity的Intent，其中ComponentName的Key必须为插件名
 * @return 插件Activity是否被成功打开？
 * FIXME 是否需要Exception来做？
 * @see #createIntent(String, String)
 * @since 1.0.0
 */
public static boolean startActivity(Context context, Intent intent) {
    // TODO 先用旧的开启Activity方案，以后再优化
    ComponentName cn = intent.getComponent();
    if (cn == null) {
        // TODO 需要支持Action方案
        return false;
    }
    String plugin = cn.getPackageName();
    String cls = cn.getClassName();
    return PluginFactory.startActivityWithNoInjectCN(context, intent, plugin, cls, IPluginManager.PROCESS_AUTO);
}
 

public static ComponentName getComponentName(Context context, Intent intent) {
	PackageManager packageManager = context.getPackageManager();
	ComponentName resolvedComponentName = intent.resolveActivity(packageManager);
	try {
		ActivityInfo activityInfo = packageManager.getActivityInfo(resolvedComponentName, 0);
		if (activityInfo.targetActivity != null) {
			return new ComponentName(resolvedComponentName.getPackageName(), activityInfo.targetActivity);
		}
	} catch (PackageManager.NameNotFoundException e) {
		// TODO nothing
	}
	return resolvedComponentName;
}
 

public static ComponentName getComponentName(Context context, Intent intent) {
	PackageManager packageManager = context.getPackageManager();
	ComponentName resolvedComponentName = intent.resolveActivity(packageManager);
	try {
		ActivityInfo activityInfo = packageManager.getActivityInfo(resolvedComponentName, 0);
		if (activityInfo.targetActivity != null) {
			return new ComponentName(resolvedComponentName.getPackageName(), activityInfo.targetActivity);
		}
	} catch (PackageManager.NameNotFoundException e) {
		// TODO nothing
	}
	return resolvedComponentName;
}
 

private void initializeCallingPackage(final Activity activity) {
    ComponentName componentName = activity.getCallingActivity();
    if (componentName == null) {
        return;
    }
    callingPackage = componentName.getPackageName();
}
 

/**
 * 判断指定的应用是否在前台运行
 *
 * @param packageName
 * @return
 */
private boolean isAppForeground(String packageName)
{
    ActivityManager am = (ActivityManager) getSystemService(Context.ACTIVITY_SERVICE);
    ComponentName cn = am.getRunningTasks(1).get(0).topActivity;
    String currentPackageName = cn.getPackageName();
    return !TextUtils.isEmpty(currentPackageName) && currentPackageName.equals(packageName);

}
 

/**
 * getServiceInfo
 *
 * @param component ComponentName
 * @param flags     flags
 * @param userId    userId
 * @return ServiceInfo
 */
public ServiceInfo getServiceInfo(ComponentName component, int flags, int userId) {

    String packageName = component.getPackageName();

    ServiceInfo result = null;

    if (isPlugin(packageName)) {
        PackageInfo pkgInfo = getPluginPackageInfo(packageName);
        if (pkgInfo == null) {
            return null;
        }
        for (int i = 0; i < pkgInfo.services.length; i++) {
            if (component.getClassName().equalsIgnoreCase(pkgInfo.services[i].name)) {

                result = pkgInfo.services[i];
                break;
            }
        }
    } else {
        if (userId == INVALID_USER_ID) {
            result = mTarget.getServiceInfo(component, flags);
        } else {
            result = mTarget.getServiceInfo(component, flags, userId);
        }
    }

    return result;
}
 

/**
 * Obtain an {@link Intent} that will launch an explicit target activity
 * specified by sourceActivityClass's {@link #PARENT_ACTIVITY} <meta-data>
 * element in the application's manifest.
 *
 * @param context Context for looking up the activity component for the source activity
 * @param componentName ComponentName for the source Activity
 * @return a new Intent targeting the defined parent activity of sourceActivity
 * @throws NameNotFoundException if the ComponentName for sourceActivityClass is invalid
 */
public static Intent getParentActivityIntent(Context context, ComponentName componentName)
        throws NameNotFoundException {
    String parentActivity = getParentActivityName(context, componentName);
    if (parentActivity == null) return null;

    // If the parent itself has no parent, generate a main activity intent.
    final ComponentName target = new ComponentName(
            componentName.getPackageName(), parentActivity);
    final String grandparent = getParentActivityName(context, target);
    final Intent parentIntent = grandparent == null
            ? IntentCompat.makeMainActivity(target)
            : new Intent().setComponent(target);
    return parentIntent;
}
 

/**
 * Returns a widget with category {@link AppWidgetProviderInfo#WIDGET_CATEGORY_SEARCHBOX}
 * provided by the same package which is set to be global search activity.
 * If widgetCategory is not supported, or no such widget is found, returns the first widget
 * provided by the package.
 */
@TargetApi(Build.VERSION_CODES.JELLY_BEAN_MR1)
public static AppWidgetProviderInfo getSearchWidgetProvider(Context context) {
    SearchManager searchManager =
            (SearchManager) context.getSystemService(Context.SEARCH_SERVICE);
    ComponentName searchComponent = searchManager.getGlobalSearchActivity();
    if (searchComponent == null) return null;
    String providerPkg = searchComponent.getPackageName();

    AppWidgetProviderInfo defaultWidgetForSearchPackage = null;

    AppWidgetManager appWidgetManager = AppWidgetManager.getInstance(context);
    for (AppWidgetProviderInfo info : appWidgetManager.getInstalledProviders()) {
        if (info.provider.getPackageName().equals(providerPkg)) {
            if (ATLEAST_JB_MR1) {
                if ((info.widgetCategory & AppWidgetProviderInfo.WIDGET_CATEGORY_SEARCHBOX) != 0) {
                    return info;
                } else if (defaultWidgetForSearchPackage == null) {
                    defaultWidgetForSearchPackage = info;
                }
            } else {
                return info;
            }
        }
    }
    return defaultWidgetForSearchPackage;
}
 

/** Returns Package name of base activity.<p>
 * Requires GET_TASK permission
 * @param context Context to get base activity information
 * @return String containing base package name
 */
public static String getBaseActivityPackageName(Context context) {
	ComponentName activity = getBaseActivity(context);
	if (activity == null) {
		return null;
	}
	return activity.getPackageName();
}
 

public ThirdPartyWallpaperPickerListAdapter(Context context) {
    mInflater = LayoutInflater.from(context);
    mPackageManager = context.getPackageManager();
    mIconSize = context.getResources().getDimensionPixelSize(R.dimen.wallpaperItemIconSize);
    final PackageManager pm = mPackageManager;

    final Intent pickWallpaperIntent = new Intent(Intent.ACTION_SET_WALLPAPER);
    final List<ResolveInfo> apps =
            pm.queryIntentActivities(pickWallpaperIntent, 0);

    // Get list of image picker intents
    Intent pickImageIntent = new Intent(Intent.ACTION_GET_CONTENT);
    pickImageIntent.setType("image/*");
    final List<ResolveInfo> imagePickerActivities =
            pm.queryIntentActivities(pickImageIntent, 0);
    final ComponentName[] imageActivities = new ComponentName[imagePickerActivities.size()];
    for (int i = 0; i < imagePickerActivities.size(); i++) {
        ActivityInfo activityInfo = imagePickerActivities.get(i).activityInfo;
        imageActivities[i] = new ComponentName(activityInfo.packageName, activityInfo.name);
    }

    outerLoop:
    for (ResolveInfo info : apps) {
        final ComponentName itemComponentName =
                new ComponentName(info.activityInfo.packageName, info.activityInfo.name);
        final String itemPackageName = itemComponentName.getPackageName();
        // Exclude anything from our own package, and the old Launcher,
        // and live wallpaper picker
        if (itemPackageName.equals(context.getPackageName()) ||
                itemPackageName.equals("com.android.launcher") ||
                itemPackageName.equals("com.android.wallpaper.livepicker")) {
            continue;
        }
        // Exclude any package that already responds to the image picker intent
        for (ResolveInfo imagePickerActivityInfo : imagePickerActivities) {
            if (itemPackageName.equals(
                    imagePickerActivityInfo.activityInfo.packageName)) {
                continue outerLoop;
            }
        }
        mThirdPartyWallpaperPickers.add(new ThirdPartyWallpaperTile(info));
    }
}
 

private ServiceRecord retrieveServiceLocked(Intent service) {
    ComponentName cn = service.getComponent();
    ServiceRecord sr = mServicesByName.get(cn);
    if (sr != null) {
        return sr;
    }
    sr = mServicesByIntent.get(service);
    if (sr != null) {
        return sr;
    }
    String pn = cn.getPackageName();
    String name = cn.getClassName();

    // 看这个Plugin是否可以被打开
    if (!RePlugin.isPluginInstalled(pn)) {
        if (LOGR) {
            LogRelease.e(PLUGIN_TAG, "psm.is: p n ex " + name);
        }
        return null;
    }

    // 开始尝试获取插件的ServiceInfo
    ComponentList col = PluginFactory.queryPluginComponentList(pn);
    if (col == null) {
        if (LOG) {
            Log.e(TAG, "installServiceLocked(): Fetch Component List Error! pn=" + pn);
        }
        return null;
    }
    ServiceInfo si = col.getService(cn.getClassName());
    if (si == null) {
        if (LOG) {
            Log.e(TAG, "installServiceLocked(): Not register! pn=" + pn);
        }
        return null;
    }

    // 构建，放入表中
    Intent.FilterComparison fi = new Intent.FilterComparison(service);
    sr = new ServiceRecord(cn, fi, si);
    mServicesByName.put(cn, sr);
    mServicesByIntent.put(fi, sr);
    return sr;
}
 

/**
 * Get the package name of the {@link Activity} that sent the
 * {@link Intent} that started this {@code Activity}.
 * <p/>
 * <strong>WARNING</strong>: If the {@code Activity} has
 * {@code android:launchMode="singleInstance"} or {@code "singleTask"}, then
 * this method will not disconnect because it is not possible to get the
 * calling {@code Activity}, as set by
 * {@link Activity#startActivityForResult(Intent, int)}
 *
 * @param activity the {@code Activity} to check for the {@code Intent}
 * @return the package of the sending app or {@code null} if it was not a
 * {@code ACTION_CONNECT Intent} or the {@code Intent} was not sent
 * with {@link Activity#startActivityForResult(Intent, int)}
 */
public static String getCallingPackageName(Activity activity) {
    // getCallingPackage() was unstable until android-18, use this
    ComponentName componentName = activity.getCallingActivity();
    if (componentName == null)
        return null;
    String packageName = componentName.getPackageName();
    if (TextUtils.isEmpty(packageName)) {
        Log.e(activity.getClass().getSimpleName(),
                "Received Intent without sender! The Intent must be sent using startActivityForResult() and received without launchMode singleTask or singleInstance!");
    }
    return packageName;
}
 

private static String makeSafeName(ComponentName cname, IconType iconType) {
    String name = cname.getPackageName() + ":" + cname.getClassName();

    String fname = makeSafeName(name);
    if (iconType!=null) fname += "." + iconType.name();

    fname +=  ".png";

    return fname;
}