Error-proof way of starting SMS intent in Android

问题

In my Android application, I use the following code to start the messaging app and fill in a default text for a text message:

Intent intent = new Intent(Intent.ACTION_VIEW);
intent.setData(Uri.parse("sms:"+USERS_PHONE_NUMBER));
intent.putExtra("sms_body", "DUMMY TEXT");
startActivity(intent);

This works in most cases. But unfortunately, on some devices I get the following error message:

android.content.ActivityNotFoundException: No Activity found to handle Intent { act=android.intent.action.VIEW dat=sms:+XXXXXXXXXX (has extras) }
at android.app.Instrumentation.checkStartActivityResult(Instrumentation.java:1510)
at android.app.Instrumentation.execStartActivity(Instrumentation.java:1384)
at android.app.Activity.startActivityForResult(Activity.java:3131)
at android.app.Activity.startActivity(Activity.java:3237)

Obviously, the intent that I created cannot be handled.

Is there any mistake in my SMS intent code?
How can I prevent the application from crashing if the intent cannot be handled?

Should I use PackageManager.queryIntentActivities() or is there another way of solving this problem?

Thanks in advance!

回答1:

I haven't tried this intent specifically, but the simplest way will probably be to add try and catch block

try {
    startActivity(intent);
} catch (ActivityNotFoundException e) {
    // Display some sort of error message here.
}

Since you can't count on the specific Android device to have the Messaging app (some tablets for example don't have telephony services), you have to be ready.

It is a good practice in general when you're starting external activities, to avoid crashes in your app.

回答2:

Here is the code that will open the SMS activity pre-populated with the phone number to which the SMS has to be sent. This works fine on emulator as well as the device.

Intent smsIntent = new Intent(Intent.ACTION_SENDTO);
smsIntent.addCategory(Intent.CATEGORY_DEFAULT);
smsIntent.setType("vnd.android-dir/mms-sms");
smsIntent.setData(Uri.parse("sms:" + phoneNumber);

回答3:

Here is a method I use to safely open activities on Android, and give the user some feedback if the activity is not found.

public static void safeOpenActivityIntent(Context context, Intent activityIntent) {

        // Verify that the intent will resolve to an activity
          if (activityIntent.resolveActivity(context.getPackageManager()) != null) {
              context.startActivity(activityIntent);
          } else {
              Toast.makeText(context, "app not available", Toast.LENGTH_LONG).show();
          }
}

(I think I got it from one of the Google Developers videos on youtube, but now I can't find the video...)

来源：https://stackoverflow.com/questions/9508005/error-proof-way-of-starting-sms-intent-in-android

标签

android

android-intent

sms