Question

这是我的AndroidManifest.xml文件：

data = []
for grp_str in group_strings:
   data.append(self.point_dict[grp_str]['Coords'])

，这是上述代码的相应 java文件：

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android" package="com.example.mycamera"> 
<application
    android:allowBackup="true"
    android:icon="@mipmap/ic_launcher"
    android:label="@string/app_name"
    android:roundIcon="@mipmap/ic_launcher_round"
    android:supportsRtl="true"
    android:theme="@style/AppTheme">
    <activity android:name=".MainActivity">
        <intent-filter>
            <action android:name="android.intent.action.MAIN" />

            <category android:name="android.intent.category.LAUNCHER" />
        </intent-filter>
    </activity>
</application>

}

这很好，甚至没有：

package com.example.mycamera;
import android.content.Intent;
import android.graphics.Bitmap;
import android.provider.MediaStore;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.ImageView;

public class MainActivity extends AppCompatActivity {

Button btn;
ImageView imagedisplay;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

  btn = (Button)findViewById(R.id.image);
  imagedisplay = (ImageView)findViewById(R.id.image_capture);

  btn.setOnClickListener(new View.OnClickListener() {
      @Override
      public void onClick(View v) {

          Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
          startActivityForResult(intent , 0);
      }
  });
}

@Override
public void onActivityResult(int requestCode , int resultCode, Intent data){
       super.onActivityResult(requestCode,resultCode,data);

       Bitmap bitmap= (Bitmap) data.getExtras().get("data");           
       imagedisplay.setImageBitmap(bitmap);
}

在 AndroidManifest.xml文件中。

但是，在包含摄像头权限后，它不起作用并显示错误，表明您的应用已停止工作。

Answer 1

 private static final int CAMERA_REQUEST = 1888; 
private ImageView imageView;
private static final int MY_CAMERA_PERMISSION_CODE = 100;

@Override
public void onCreate(Bundle savedInstanceState)
{
    super.onCreate(savedInstanceState);
    setContentView(R.layout.main);
    this.imageView = (ImageView)this.findViewById(R.id.imageView1);
    Button photoButton = (Button) this.findViewById(R.id.button1);
    photoButton.setOnClickListener(new View.OnClickListener()
    {
        @Override
        public void onClick(View v)
        {
            if (checkSelfPermission(Manifest.permission.CAMERA) != PackageManager.PERMISSION_GRANTED)
            {
                requestPermissions(new String[]{Manifest.permission.CAMERA}, MY_CAMERA_PERMISSION_CODE);
            }
            else
            {
                Intent cameraIntent = new Intent(android.provider.MediaStore.ACTION_IMAGE_CAPTURE); 
                startActivityForResult(cameraIntent, CAMERA_REQUEST);
            } 
        }
    });
}

@Override
public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults)
{
    super.onRequestPermissionsResult(requestCode, permissions, grantResults);
    if (requestCode == MY_CAMERA_PERMISSION_CODE)
    {
        if (grantResults[0] == PackageManager.PERMISSION_GRANTED)
        {
            Toast.makeText(this, "camera permission granted", Toast.LENGTH_LONG).show();
            Intent cameraIntent = new Intent(android.provider.MediaStore.ACTION_IMAGE_CAPTURE); 
            startActivityForResult(cameraIntent, CAMERA_REQUEST);
        }
        else
        {
            Toast.makeText(this, "camera permission denied", Toast.LENGTH_LONG).show();
        }
    }

    protected void onActivityResult(int requestCode, int resultCode, Intent data)
    {  
        if (requestCode == CAMERA_REQUEST && resultCode == Activity.RESULT_OK)
        {  
            Bitmap photo = (Bitmap) data.getExtras().get("data"); 
            imageView.setImageBitmap(photo);
        }  
    } 
}

Answer 2

尝试一次：

私有布尔isVersionBelowMarshmallow = false;

public boolean checkPermissionForCamera() {
    if (Build.VERSION.SDK_INT < Build.VERSION_CODES.M) {
        isVersionBelowMarshmallow = true;
    }
    if (isVersionBelowMarshmallow)
        return true;
    int result = ContextCompat.checkSelfPermission(getApplicationContext(), Manifest.permission.CAMERA);
    return result == PackageManager.PERMISSION_GRANTED;
}

Answer 3

尝试这些解决方案一次：

if（checkAndRequestPermissions（getContext（）））{

私有布尔checkAndRequestPermissions（上下文上下文）{

    int ExtstorePermission = ContextCompat.checkSelfPermission(context, Manifest.permission.READ_EXTERNAL_STORAGE);
    int cameraPermission = ContextCompat.checkSelfPermission(context, Manifest.permission.CAMERA);
    List<String> listPermissionsNeeded = new ArrayList<>();
    if (cameraPermission != PackageManager.PERMISSION_GRANTED) {
        listPermissionsNeeded.add(Manifest.permission.CAMERA);
    }
    if (ExtstorePermission != PackageManager.PERMISSION_GRANTED) {
        listPermissionsNeeded.add(Manifest.permission.WRITE_EXTERNAL_STORAGE);
    }
    if (!listPermissionsNeeded.isEmpty()) {
        ActivityCompat.requestPermissions(getActivity(), listPermissionsNeeded.toArray(new String[listPermissionsNeeded.size()]), REQUEST_ID_MULTIPLE_PERMISSIONS);
        return false;
    }
    return true;
}

@Override
public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {

    if (ContextCompat.checkSelfPermission(getContext(), Manifest.permission.WRITE_EXTERNAL_STORAGE) != PackageManager.PERMISSION_GRANTED) {
        Toast.makeText(getApplicationContext(), "FlagUp Requires Access to Your Storage.", Toast.LENGTH_SHORT).show();
      //  finish();
        //super.onRequestPermissionsResult(requestCode, permissions, grantResults);
    }
    if (ContextCompat.checkSelfPermission(getContext(), Manifest.permission.CAMERA) != PackageManager.PERMISSION_GRANTED) {
        Toast.makeText(getApplicationContext(), "FlagUp Requires Access to Camara.", Toast.LENGTH_SHORT).show();
       // finish();
    }
}

“ android.permission.CAMERA”给出了包含在AndroidManifes.xml文件中的错误

3 个答案: