android.util.AndroidRuntimeException：从 Activity 标志外调用 startActivity()答案

【问题标题】：android.util.AndroidRuntimeException: Calling startActivity() from outside of an Activity flagandroid.util.AndroidRuntimeException：从 Activity 标志外调用 startActivity()
【发布时间】：2021-02-08 03:11:16
【问题描述】：

...来自 Activity 上下文的外部需要 FLAG_ACTIVITY_NEW_TASK 标志。这真的是你想要的吗？

我正在尝试分享我在图像视图中的图像

shareButton.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
             shareImage(getApplicationContext(), resID);

            }
        });
    }

    public static void shareImage(Context context, Integer resource_id) {
        Bitmap b = BitmapFactory.decodeResource(context.getResources(), resource_id);
        Intent share = new Intent(Intent.ACTION_SEND);
        share.setType("image/jpeg");
        ByteArrayOutputStream bytes = new ByteArrayOutputStream();
        b.compress(Bitmap.CompressFormat.JPEG, 100, bytes);
        String path = MediaStore.Images.Media.insertImage(context.getContentResolver(), b, "Title", null);
        Uri imageUri = Uri.parse(path);
        share.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
        share.putExtra(Intent.EXTRA_STREAM, imageUri);
        context.startActivity(Intent.createChooser(share, "Select"));
    }

但我有这个问题：

E/AndroidRuntime: FATAL EXCEPTION: main
    Process: com.example.myapplication, PID: 2347
    android.util.AndroidRuntimeException: Calling startActivity() from outside of an Activity  context requires the FLAG_ACTIVITY_NEW_TASK flag. Is this really what you want?
        at android.app.ContextImpl.startActivity(ContextImpl.java:1014)
        at android.app.ContextImpl.startActivity(ContextImpl.java:990)
        at android.content.ContextWrapper.startActivity(ContextWrapper.java:403)
        at com.example.myapplication.SinglePhoto.shareImage(SinglePhoto.java:61)
        at com.example.myapplication.SinglePhoto$1.onClick(SinglePhoto.java:45)
        at android.view.View.performClick(View.java:7357)
        at android.view.View.performClickInternal(View.java:7334)
        at android.view.View.access$3600(View.java:808)
        at android.view.View$PerformClick.run(View.java:28200)
        at android.os.Handler.handleCallback(Handler.java:907)
        at android.os.Handler.dispatchMessage(Handler.java:99)
        at android.os.Looper.loop(Looper.java:223)
        at android.app.ActivityThread.main(ActivityThread.java:7478)
        at java.lang.reflect.Method.invoke(Native Method)
        at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:549)
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:941)

我试过了

share.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK)

但问题仍然存在。感谢您的帮助！

【问题讨论】：

你不需要 FLAG_ACTIVITY_NEW_TASK 只需按照这里的步骤developer.android.com/training/sharing/send.html

标签： android android-intent imageview android-context

【解决方案1】：

您需要添加此标志不是为了共享意图，而是为了您开始活动的意图：

    Intent sharingIntent = new Intent(android.content.Intent.ACTION_SEND);
sharingIntent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
sharingIntent.setType("text/plain");
sharingIntent.putExtra(android.content.Intent.EXTRA_TEXT, shareBody);

Intent startIntent = Intent.createChooser(sharingIntent, context.getResources().getString(R.string.app_name));
startIntent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
context.startActivity(startIntent);

【讨论】：