从我们自己的角度启动 android 应用程序

Question

HIE ALL i am trying to create a custom home screen in android. i,e in the carousel view. i am able to show the application icons in the carousel view but unable to launch the application. i,e on click of a particular application icon i need to launch the application but i am getting the error(force close). this is error log what i am getting

08-10 16:04:31.570: ERROR/AndroidRuntime(1028): FATAL EXCEPTION: main 08-10 16:04:31.570: ERROR/AndroidRuntime(1028): java.lang.ClassCastException: java.lang.Integer 08-10 16:04:31.570: ERROR/AndroidRuntime(1028): at com.carouseldemo.main.MainActivity$1.onItemClick(MainActivity.java:75) 08-10 16:04:31.570: ERROR/AndroidRuntime(1028): at com.carouseldemo.controls.CarouselAdapter.performItemClick(CarouselAdapter.java:261) 08-10 16:04:31.570: ERROR/AndroidRuntime(1028): at com.carouseldemo.controls.Carousel.onSingleTapUp(Carousel.java:1076) 08-10 16:04:31.570: ERROR/AndroidRuntime(1028): at android.view.GestureDetector.onTouchEvent(GestureDetector.java:557) 08-10 16:0 4:31.570: ERROR/AndroidRuntime(1028): at com.carouseldemo.controls.Carousel.onTouchEvent(Carousel.java:327) 08-10 16:04:31.570: ERROR/AndroidRuntime(1028): at android.view.View.dispatchTouchEvent(View.java:3766) 08-10 16:04:31.570: ERROR/AndroidRuntime(1028): at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:897) 08-10 16:04:31.570: ERROR/AndroidRuntime(1028): at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:936) 08-10 16:04:31.570: ERROR/AndroidRuntime(1028): at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:936) 08-10 16:04:31.570: ERROR/AndroidRuntime(1028): at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.Z93F725A07423FE1C889F448B33D21 F46Z:936) 08-10 16:04:31.570: ERROR/AndroidRuntime(1028): at com.android.internal.policy.impl.PhoneWindow$DecorView.superDispatchTouchEvent(PhoneWindow.java:1671) 08-10 16:04:31.570: ERROR/AndroidRuntime(1028): at com.android.internal.policy.impl.PhoneWindow.superDispatchTouchEvent(PhoneWindow.java:1107) 08-10 16:04:31.570: ERROR/AndroidRuntime(1028): at android.app.Activity.dispatchTouchEvent(Activity.java:2086) 08-10 16:04:31.570: ERROR/AndroidRuntime(1028): at com.android.internal.policy.impl.PhoneWindow$DecorView.dispatchTouchEvent(PhoneWindow.java:1655) 08-10 16:04:31.570: ERROR/AndroidRuntime(1028): at android.view.ViewRoot.handleMessage( ViewRoot.java:1785) 08-10 16:04:31.570: ERROR/AndroidRuntime(1028): at android.os.Handler.dispatchMessage(Handler.java:99) 08-10 16:04:31.570: ERROR/AndroidRuntime(1028): at android.os.Looper.loop(Looper.java:123) 08-10 16:04:31.570: ERROR/AndroidRuntime(1028): at android.app.ActivityThread.main(ActivityThread.java:4627) 08-10 16:04:31.570: ERROR/AndroidRuntime(1028): at java.lang.reflect.Method.invokeNative(Native Method) 08-10 16:04:31.570: ERROR/AndroidRuntime(1028): at java.lang.reflect.Method.invoke(Method.java:521) 08-10 16:04:31.570: ERROR/AndroidRuntime(1028): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.Z93 F725A07423FE1C889F448B33D21F46Z:868) 08-10 16:04:31.570: ERROR/AndroidRuntime(1028): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626) 08-10 16:04:31.570: ERROR/AndroidRuntime(1028): at dalvik.system.NativeStart.main(Native Method)

initially i am taking only six images.

please help

thanks in advance datta

Answer 1

You're getting a ClassCastException in line 75 of MainActivity:

 java.lang.ClassCastException: java.lang.Integer

Be sure that the parameter you are using really is an Integer.

Answer 2

To launch other application from your app, you need to have it's package name and you can start other app thru;

ResolveInfo info;
packageName = info.activityInfo.applicationInfo.packageName;

Intent mIntent = getPackageManager().getLaunchIntentForPackage(packageName);
        mIntent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
        mIntent.addFlags(Intent.FLAG_ACTIVITY_RESET_TASK_IF_NEEDED);
        if (null != mIntent) {
            try {
                startActivity(mIntent);
            } catch(Exception e) {      }
        }

you can get installed package thru:

ArrayList<PackageInfo> res = new ArrayList<PackageInfo>();
        PackageManager pm = context.getApplicationContext().getPackageManager();
        List<PackageInfo> packs = pm.getInstalledPackages(0);