Example usage for android.content Intent ACTION

Introduction

In this page you can find the example usage for android.content Intent ACTION_MAIN.

Prototype

String ACTION_MAIN

To view the source code for android.content Intent ACTION_MAIN.

Click Source Link

Document

Activity Action: Start as a main entry point, does not expect to receive data.

Usage

From source file:Main.java

public static String getAppMainActivity(Context context, String packageName) {
    if (TextUtils.isEmpty(packageName)) {
        return "";
    }//www.  ja  v a 2 s . c  o m
    final Intent intent = new Intent(Intent.ACTION_MAIN);
    intent.addCategory(Intent.CATEGORY_LAUNCHER);
    intent.setPackage(packageName);
    final ResolveInfo res = context.getPackageManager().resolveActivity(intent, 0);
    if (res == null || res.activityInfo == null) {
        return "";
    }
    return res.activityInfo.name;
}

From source file:Main.java

/**
 * @param packageName//from w  w w  . j  a  v  a  2 s . c  o m
 * @param context
 */
public static void openApp(String packageName, Context context) {

    Intent resolveIntent = new Intent(Intent.ACTION_MAIN, null);

    resolveIntent.addCategory(Intent.CATEGORY_LAUNCHER);

    resolveIntent.setPackage(packageName);

    List<ResolveInfo> apps = context.getPackageManager().queryIntentActivities(resolveIntent, 0);

    ResolveInfo ri = apps.iterator().next();

    if (ri != null) {

        String packageName_i = ri.activityInfo.packageName;

        String className_i = ri.activityInfo.name;

        Intent intent = new Intent(Intent.ACTION_MAIN);

        intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);

        intent.addCategory(Intent.CATEGORY_LAUNCHER);

        ComponentName cn = new ComponentName(packageName_i, className_i);

        intent.setComponent(cn);

        context.startActivity(intent);

    }

}

From source file:Main.java

public static boolean isMyLauncherDefault(Context context) {
    final IntentFilter filter = new IntentFilter(Intent.ACTION_MAIN);
    filter.addCategory(Intent.CATEGORY_HOME);

    List<IntentFilter> filters = new ArrayList<IntentFilter>();
    filters.add(filter);//from  w w w. ja va  2 s .  co  m

    final String myPackageName = context.getPackageName();
    List<ComponentName> activities = new ArrayList<>();
    PackageManager packageManager = (PackageManager) context.getPackageManager();

    // You can use name of your package here as third argument
    packageManager.getPreferredActivities(filters, activities, null);

    if (activities.size() == 0) //no default
        return true;

    for (ComponentName activity : activities) {
        if (myPackageName.equals(activity.getPackageName())) {
            return true;
        }
    }
    return false;
}

From source file:Main.java

public static void startApkActivity(final Context ctx, String packageName) {
    PackageManager pm = ctx.getPackageManager();
    PackageInfo pi;//www .  j a va 2 s . c o m
    try {
        pi = pm.getPackageInfo(packageName, 0);
        Intent intent = new Intent(Intent.ACTION_MAIN, null);
        intent.addCategory(Intent.CATEGORY_LAUNCHER);
        intent.setPackage(pi.packageName);

        List<ResolveInfo> apps = pm.queryIntentActivities(intent, 0);

        ResolveInfo ri = apps.iterator().next();
        if (ri != null) {
            String className = ri.activityInfo.name;
            intent.setComponent(new ComponentName(packageName, className));
            ctx.startActivity(intent);
        }
    } catch (PackageManager.NameNotFoundException e) {
        e.printStackTrace();
    }
}

From source file:Main.java

public static void installLaunchShortCut(Context context, Intent intent, String shortCutName, Bitmap icon,
        boolean duplicate) {
    Intent shortCutIntent = new Intent("com.android.launcher.action.INSTALL_SHORTCUT");
    shortCutIntent.putExtra(Intent.EXTRA_SHORTCUT_NAME, shortCutName);
    shortCutIntent.putExtra(Intent.EXTRA_SHORTCUT_ICON, icon);
    shortCutIntent.putExtra("duplicate", duplicate);
    intent.setAction(Intent.ACTION_MAIN);
    shortCutIntent.putExtra(Intent.EXTRA_SHORTCUT_INTENT, intent);
    context.sendBroadcast(shortCutIntent);
}

From source file:Main.java

public static void startApkActivity(final Context ctx, String packageName) {
    PackageManager pm = ctx.getPackageManager();
    PackageInfo pi;//  www  .  j a va  2 s.  c o  m
    try {
        pi = pm.getPackageInfo(packageName, 0);
        Intent intent = new Intent(Intent.ACTION_MAIN, null);
        intent.addCategory(Intent.CATEGORY_LAUNCHER);
        intent.setPackage(pi.packageName);

        List<ResolveInfo> apps = pm.queryIntentActivities(intent, 0);

        ResolveInfo ri = apps.iterator().next();
        if (ri != null) {
            String className = ri.activityInfo.name;
            intent.setComponent(new ComponentName(packageName, className));
            ctx.startActivity(intent);
        }
    } catch (NameNotFoundException e) {
        e.printStackTrace();
    }
}

From source file:Main.java

/**
 * Checks the availability of the DownloadManager.
 *
 * @param context used to update the device version and DownloadManager information
 * @return true if the download manager is available
 *//*w w w. j  a va 2  s .c  o  m*/
public static boolean isDownloadManagerAvailable(Context context) {
    try {
        if (Build.VERSION.SDK_INT < Build.VERSION_CODES.GINGERBREAD) {
            return false;
        }
        Intent intent = new Intent(Intent.ACTION_MAIN);
        intent.addCategory(Intent.CATEGORY_LAUNCHER);
        intent.setClassName("com.android.providers.downloads.ui",
                "com.android.providers.downloads.ui.DownloadList");
        List<ResolveInfo> list = context.getPackageManager().queryIntentActivities(intent,
                PackageManager.MATCH_DEFAULT_ONLY);
        return !list.isEmpty();
    } catch (Exception e) {
        return false;
    }
}

From source file:Main.java

public static void startAppByPackageName(Context context, String packageName) {
    PackageInfo pi = null;/*from  w w w  . j a  v  a 2  s.co m*/
    try {
        pi = context.getPackageManager().getPackageInfo(packageName, 0);
    } catch (NameNotFoundException e) {
        e.printStackTrace();
    }

    Intent resolveIntent = new Intent(Intent.ACTION_MAIN, null);
    resolveIntent.addCategory(Intent.CATEGORY_LAUNCHER);
    resolveIntent.setPackage(pi.packageName);

    List<ResolveInfo> apps = context.getPackageManager().queryIntentActivities(resolveIntent, 0);

    ResolveInfo ri = apps.iterator().next();
    if (ri != null) {
        String packageName1 = ri.activityInfo.packageName;
        String className = ri.activityInfo.name;

        Intent intent = new Intent(Intent.ACTION_MAIN);
        intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
        intent.addCategory(Intent.CATEGORY_LAUNCHER);

        ComponentName cn = new ComponentName(packageName1, className);

        intent.setComponent(cn);
        context.startActivity(intent);
    }

}

From source file:Main.java

/**
 * open another app/*from  www.j  a  v a2s.  co m*/
 * @param context
 * @param packageName
 * @throws NameNotFoundException 
 */
public static void openApp(Context context, String packageName) throws NameNotFoundException {
    PackageInfo pi = context.getPackageManager().getPackageInfo(packageName, 0);

    Intent resolveIntent = new Intent(Intent.ACTION_MAIN, null);
    resolveIntent.addCategory(Intent.CATEGORY_LAUNCHER);
    resolveIntent.setPackage(pi.packageName);

    List<ResolveInfo> apps = context.getPackageManager().queryIntentActivities(resolveIntent, 0);

    Iterator<ResolveInfo> iterator = apps.iterator();
    while (iterator.hasNext()) {
        ResolveInfo ri = iterator.next();
        if (ri != null) {
            packageName = ri.activityInfo.packageName;
            String className = ri.activityInfo.name;
            Intent intent = new Intent(Intent.ACTION_MAIN);
            intent.addCategory(Intent.CATEGORY_LAUNCHER);
            ComponentName cn = new ComponentName(packageName, className);
            intent.setComponent(cn);
            context.startActivity(intent);
        }
    }
}

From source file:Main.java

private static void prepareRestartAppIntent(Intent i) {
    i.setAction(Intent.ACTION_MAIN);
    i.addCategory(Intent.CATEGORY_LAUNCHER);
    i.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
    i.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
}

Example usage for android.content Intent ACTION_MAIN

Introduction

Prototype

Document

Usage