相关疑难解决方法(0)

查看intent.resolveActivity != null 但启动 Intent 会引发 ActivityNotFound 异常，我在打开浏览器或具有深度链接的应用程序时写道：

private fun openUrl(url: String) {
    val intent = Intent().apply {
        action = Intent.ACTION_VIEW
        data = Uri.parse(url)
//        setDataAndType(Uri.parse(url), "text/html")
//        component = ComponentName("com.android.browser", "com.android.browser.BrowserActivity")
//        flags = Intent.FLAG_ACTIVITY_CLEAR_TOP + Intent.FLAG_GRANT_READ_URI_PERMISSION
    }
    val activityInfo = intent.resolveActivityInfo(packageManager, intent.flags)
    if (activityInfo?.exported == true) {
        startActivity(intent)
    } else {
        Toast.makeText(
            this,
            "No application can handle the link",
            Toast.LENGTH_SHORT
        ).show()
    }
}

它不起作用。在 API 30 模拟器中找不到浏览器，而一个常见的解决方案有效：

private fun openUrl(url: String) {
    val intent …

我在这里发布这个问题用于教育目的,因为我无法在任何地方找到答案,最终找到了原因,即我自己.

这是有问题的代码:

// initially getting the intent from polling the PackageManager about activities resolving Search intent.

ComponentName componentName = intent.resolveActivity(pm);

if (componentName != null) {
    context.startActivity(intent);
}

尽管检查我得到一个ActivityNotFound异常.

编辑:显然这一点对每个人来说并不明显:为什么有一个活动解决了意图,但试图启动它会抛出一个ActivityNotFound异常 - 两个事实显然是矛盾的？

我需要播放存储在我的SD卡位置的3gp音频文件,以便在My HTC设备中使用我的默认媒体播放器播放它.

请帮忙

代码:

 public class AudioRecorder extends Activity {

     private static final String CAMERA_STATUS = "camera_upload";
        private static final String GALLERY_STATUS = "gallery_upload";
        MediaRecorder recorder = new MediaRecorder();
        static String path = "audio-android.3gp";
        Button startRecording;
        Button stopRecording;
        Button save;
        Button palyAudio;
        private Context context;


     private String sanitizePath(String path) {
        if (!path.startsWith("/")) {
            path = "/" + path;
        }
        if (!path.contains(".")) {
            path += ".3gp";
        }
        return Environment.getExternalStorageDirectory().getAbsolutePath()
            + path;
        }



     @Override
        protected void onCreate(Bundle savedInstanceState) {
        // TODO Auto-generated …