java - requestPermissions() 什么都不做

Question

问题...

我正在尝试在 Android Marshmallow 中实现运行时权限，同时保持向后兼容性。我以前已经成功完成过此操作，我不确定这次有什么不同。我已经在物理 Note 5(运行 Mallow)上测试了它，并使用在 Marshmallow 上设置的模拟器，两者都不起作用。

我意识到“它不起作用”并不是很有帮助，但我不知道还能说什么，什么也没有发生。该应用程序不会崩溃，只是在 requestPermissions(perms, 222) 之后挂起。被调用。

我做错了什么？

详细信息...

我的 Activity 的相关部分:

public class HomeActivity extends Activity implements View.OnClickListener {

    @Override
    public void onClick(View v) {
        switch(v.getId()){
            case R.id.btn_home_scancertificate:
                if (ContextCompat.checkSelfPermission(HomeActivity.this, "android.permission.CAMERA") != PackageManager.PERMISSION_GRANTED){
                    showNoPermDialog();
                }else {
                    AppData.ActionType = ActionType.SCAN_CERTIFICATE;
                    intent = new Intent(HomeActivity.this, CaptureActivity.class);
                    startActivity(intent);
                }
                break;
        }
    }

    @Override
    public void onRequestPermissionsResult(int requestCode, String permissions[], int[] grantResults) {
        Log.e("HomeActivity", "Permissions results...");

        switch (requestCode) {
            case 222: {

                boolean granted = (grantResults.length > 0 && grantResults[0] == PackageManager.PERMISSION_GRANTED);
                Log.e("HomeActivity", granted?"granted permission":"denied permission");

                AppData.ActionType = ActionType.SCAN_POSTCARD;
                intent = new Intent(HomeActivity.this, CaptureActivity.class);
                startActivity(intent);
            }
        }
    }

    public void getCamPerm(){
        Log.e("HomeActivity", "Build version: "+Build.VERSION.SDK_INT);
        if (Build.VERSION.SDK_INT >= 23) {
            Log.e("HomeActivity", "Getting permissions");

            String[] perms = new String[]{Manifest.permission.CAMERA};
            requestPermissions(perms, 222);
        }
    }

    public void showNoPermDialog(){
        if (Build.VERSION.SDK_INT >= 23) {
            boolean showRationale = shouldShowRequestPermissionRationale(Manifest.permission.CAMERA);

            String status = showRationale ? "showing rationale" : "skipping rationale";
            Log.e("HomeActivity", status);

            if (showRationale) {
                AlertDialog.Builder alertDialogBuilder = new AlertDialog.Builder(this);
                alertDialogBuilder.setTitle("Need permission");
                alertDialogBuilder
                    .setMessage("App requires camera permission for the use of the scanner.")
                    .setCancelable(false)
                    .setPositiveButton("Ok", new DialogInterface.OnClickListener() {
                        public void onClick(DialogInterface dialog, int id) {
                            dialog.cancel();
                            getCamPerm();
                        }
                    });
                AlertDialog alertDialog = alertDialogBuilder.create();
                alertDialog.show();
            }else getCamPerm();

        }else {

            AlertDialog.Builder alertDialogBuilder = new AlertDialog.Builder(this);
            alertDialogBuilder.setTitle("Need permission");
            alertDialogBuilder
                    .setMessage("App requires permission to use the camera. You have disabled camera permission. Please re-enable this permission thru Settings -> Apps -> Our Town -> Permissions.")
                    .setCancelable(false)
                    .setPositiveButton("Ok", new DialogInterface.OnClickListener() {
                        public void onClick(DialogInterface dialog, int id) {
                            dialog.cancel();
                        }
                    });
            AlertDialog alertDialog = alertDialogBuilder.create();
            alertDialog.show();
        }
    }

}

运行时，仅记录这些( onRequestPermissionsResult() 根本不会被调用)

E/HomeActivity: skipping rationale

E/HomeActivity: Build version: 23

E/HomeActivity: Getting permissions

list 包括:<uses-permission android:name="android.permission.CAMERA" />

编辑

仅在我第一次单击该按钮时，它才会显示在 Logcat 中，并且似乎是由调用 shouldShowRequestPermissionRationale() 触发的

08-17 11:26:36.996 20660-20660/com.ourtownamerica.ourtowntrutrak W/ViewRootImpl: Cancelling event due to no window focus: MotionEvent { action=ACTION_CANCEL, actionButton=0, id[0]=0, x[0]=1035.6592, y[0]=770.2344, toolType[0]=TOOL_TYPE_FINGER, buttonState=0, metaState=0, flags=0x0, edgeFlags=0x0, pointerCount=1, historySize=0, eventTime=8508970, downTime=8506643, deviceId=0, source=0x1002 }
08-17 11:26:36.996 20660-20660/com.ourtownamerica.ourtowntrutrak W/ViewRootImpl: Cancelling event due to no window focus: MotionEvent { action=ACTION_CANCEL, actionButton=0, id[0]=0, x[0]=1035.6592, y[0]=770.2344, toolType[0]=TOOL_TYPE_FINGER, buttonState=0, metaState=0, flags=0x0, edgeFlags=0x0, pointerCount=1, historySize=0, eventTime=8508970, downTime=8506643, deviceId=0, source=0x1002 }
08-17 11:26:36.996 20660-20660/com.ourtownamerica.ourtowntrutrak W/ViewRootImpl: Cancelling event due to no window focus: MotionEvent { action=ACTION_CANCEL, actionButton=0, id[0]=0, x[0]=1035.6592, y[0]=770.2344, toolType[0]=TOOL_TYPE_FINGER, buttonState=0, metaState=0, flags=0x0, edgeFlags=0x0, pointerCount=1, historySize=0, eventTime=8508970, downTime=8506643, deviceId=0, source=0x1002 }
08-17 11:26:36.997 20660-20660/com.ourtownamerica.ourtowntrutrak W/ViewRootImpl: Cancelling event due to no window focus: MotionEvent { action=ACTION_CANCEL, actionButton=0, id[0]=0, x[0]=1035.6592, y[0]=770.2344, toolType[0]=TOOL_TYPE_FINGER, buttonState=0, metaState=0, flags=0x0, edgeFlags=0x0, pointerCount=1, historySize=0, eventTime=8508970, downTime=8506643, deviceId=0, source=0x1002 }

编辑2

我从它所在的 Activity 中复制了相同的原始代码，并将其移动到启动 Activity 中，并且在那里工作正常。它现在可以留在那里，但如果有人知道发生了什么，我们仍然会感激不已。

Answer 1

好吧，尝试使用 Manifest.permission.CAMERA 而不是“android.permission.CAMERA”

还用于代码质量检查 android 是否为 23 在按钮中单击本身 R.id.btn_home_scancertificate:

if (Build.VERSION.SDK_INT >= 23 && ContextCompat.checkSelfPermission(activity,
            Manifest.permission.CAMERA)
            != PackageManager.PERMISSION_GRANTED) {

        showNoPermDialog();

    } else {
        AppData.ActionType = ActionType.SCAN_CERTIFICATE;
                intent = new Intent(HomeActivity.this, CaptureActivity.class);
                startActivity(intent);
    }

    //in alertdialog button simply place this for requesting permission
    ActivityCompat.requestPermissions(activity,
            new String[]{Manifest.permission.CAMERA},
            222);