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本文同步自http://javaexception.com/archives/225
最近线上报错,有个用户连续crash了10次左右,查看了下堆栈信息,发现是提示com.android.camera.action.CROP这个Intent找不到,报了ActivityNotFound的错误。根据经验得出结论,这个用户的设备上,肯定是去掉了支持Crop的应用,所以直接做Intent隐私跳转到这会crash,思考了下,解决思路是在跳转前做检测,或者是全局做检测。
全局检测的方式:
public boolean isAvailable(Context context, Intent intent) {
PackageManager packageManager = context.getPackageManager();
List list = packageManager.queryIntentActivities(intent, PackageManager.MATCH_DEFAULT_ONLY);
return list.size() > 0;
}
经过测试,在com.android.camera.action.CROP没效果,只能放弃,但是这个对某些Intent是支持的,也是一种办法
第二种就是在跳转前检测:
private void crop(String imagePath) { File file = new File(FileUtils.createRootPath(this) + "/" + System.currentTimeMillis() + ".jpg"); cropImagePath = file.getAbsolutePath(); Intent intent = new Intent("com.android.camera.action.CROP"); intent.setDataAndType(getImageContentUri(new File(imagePath)), "image/*"); intent.putExtra("crop", "true"); intent.putExtra("aspectX", config.aspectX); intent.putExtra("aspectY", config.aspectY); intent.putExtra("outputX", config.outputX); intent.putExtra("outputY", config.outputY); intent.putExtra("scale", true); intent.putExtra("scaleUpIfNeeded", true); intent.putExtra("return-data", false); intent.putExtra(MediaStore.EXTRA_OUTPUT, Uri.fromFile(file)); intent.putExtra("outputFormat", Bitmap.CompressFormat.JPEG.toString()); intent.putExtra("noFaceDetection", true); startActivityForResult(intent, IMAGE_CROP_CODE); }
我修改后的检测代码如下:
private boolean canCrop(String imagePath) { File file = new File(FileUtils.createRootPath(this) + "/" + System.currentTimeMillis() + ".jpg"); Intent intent = new Intent("com.android.camera.action.CROP"); intent.setDataAndType(getImageContentUri(new File(imagePath)), "image/*"); intent.putExtra("crop", "true"); intent.putExtra("aspectX", config.aspectX); intent.putExtra("aspectY", config.aspectY); intent.putExtra("outputX", config.outputX); intent.putExtra("outputY", config.outputY); intent.putExtra("scale", true); intent.putExtra("scaleUpIfNeeded", true); intent.putExtra("return-data", false); intent.putExtra(MediaStore.EXTRA_OUTPUT, Uri.fromFile(file)); intent.putExtra("outputFormat", Bitmap.CompressFormat.JPEG.toString()); intent.putExtra("noFaceDetection", true); if (intent.resolveActivity(getPackageManager()) != null) { return true; } else { // 没有安装所需应用 return false; } }
关键代码是Intent.resolveActivity(getPackageManager()) != null
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https://juejin.im/entry/59a93530f265da24823642b3