Question

我需要打开相机并拍照并在imageview中显示。

但问题是我正在崩溃，如下所示。我清理了构建并运行。但仍然会出现这个问题。

 Caused by: java.lang.IllegalArgumentException: Failed to find configured root that contains /storage/emulated/0/Android/data/com.trial.learn/files/Pictures/JPEG_20180515_104113_6007506636120272936.jpg
                                                                     at android.support.v4.content.FileProvider$SimplePathStrategy.getUriForFile(FileProvider.java:711)
                                                                     at android.support.v4.content.FileProvider.getUriForFile(FileProvider.java:400)
                                                                     at com.trial.learn.MainActivity.openCamera(MainActivity.java:57)
                                                                     at com.trial.learn.MainActivity.checkCameraPermission(MainActivity.java:37)
                                                                     at com.trial.learn.MainActivity.onCreate(MainActivity.java:31)
                                                                     at android.app.Activity.performCreate(Activity.java:6998)
                                                                     at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1230)
                                                                     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2899)
                                                                     at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:3046) 
                                                                     at android.app.ActivityThread.-wrap11(Unknown Source:0) 
                                                                     at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1688) 
                                                                     at android.os.Handler.dispatchMessage(Handler.java:105) 
                                                                     at android.os.Looper.loop(Looper.java:164) 
                                                                     at android.app.ActivityThread.main(ActivityThread.java:6809) 
                                                                     at java.lang.reflect.Method.invoke(Native Method) 
                                                                     at com.android.internal.os.Zygote$MethodAndArgsCaller.run(Zygote.java:240) 
                                                                     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:767)

这是代码。我无知我在做什么错。请指正。

我甚至在清单文件中添加了权限。

public class MainActivity extends AppCompatActivity {
    private String mCurrentPhotoPath,mCurrentPhotoPathResize;
    private ImageView imageView;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        imageView = (ImageView)findViewById(R.id.imageView);
        checkCameraPermission();
    }
    private void checkCameraPermission() {
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M)
            if (!checkPermission(this, Manifest.permission.CAMERA, 123))
                checkPermission(this, Manifest.permission.CAMERA, 123);
            else openCamera();
        else openCamera();
    }
    private void openCamera() {
        Intent takePictureIntent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);

        if (takePictureIntent.resolveActivity(this.getPackageManager()) != null) {
            File photoFile = null;
            File photoFile2 = null;
            try {
                photoFile = ImageResizeUtility.createImageFile(this);
                photoFile2 = ImageResizeUtility.createImageFile2(this);
            } catch (IOException ex) {
                // Error occurred while creating the File
            }
            mCurrentPhotoPath = photoFile.getAbsolutePath();
            mCurrentPhotoPathResize = photoFile2.getAbsolutePath();
            Log.e("url",mCurrentPhotoPath);
            Log.e("urls",mCurrentPhotoPathResize);

            Uri photoURI = FileProvider.getUriForFile(MainActivity.this, "com.trial.learn.authority", photoFile);
            takePictureIntent.putExtra(MediaStore.EXTRA_OUTPUT, photoURI);
            startActivityForResult(takePictureIntent, 111);
        }
    }

    public static boolean checkPermission(Activity context, String permission, int requestCode) {
        if (ContextCompat.checkSelfPermission(context, permission) != PackageManager.PERMISSION_GRANTED) {
            ActivityCompat.requestPermissions(context,
                    new String[]{permission},
                    requestCode);
            return false;
        } else {
            return true;
        }
    }

    @Override
    public void onActivityResult(int requestCode, int resultCode, Intent data) {
        super.onActivityResult(requestCode, resultCode, data);
        if (requestCode == 111 && resultCode == RESULT_OK) {
            ImageResizeUtility.compressImage(this, mCurrentPhotoPath, mCurrentPhotoPathResize, imageView);
            String _imagePath = mCurrentPhotoPathResize;
            Log.e("urlOnActivity",_imagePath);
        }
    }
    @Override
    public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
        super.onRequestPermissionsResult(requestCode, permissions, grantResults);
        switch (requestCode) {
            case 123:
                if (grantResults.length > 0 && grantResults[0] == PackageManager.PERMISSION_GRANTED)
                    openCamera();
                break;
        }
    }
}

XML / file_paths.xml：

<?xml version="1.0" encoding="utf-8"?>
<paths xmlns:android="http://schemas.android.com/apk/res/android">
    <external-path name="my_images" path="Android/data/com.trial.learn/files/Pictures" />
</paths>

android manifest.xml：

<uses-permission android:name="android.permission.CAMERA" />
    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
    <uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
    <uses-permission android:name="android.permission.INTERNET" />
    <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
    <uses-permission android:name="android.permission.INTERNET" />


<provider
            android:name="android.support.v4.content.FileProvider"
            android:authorities="com.trial.learn.authority"
            android:exported="false"
            android:grantUriPermissions="true">
            <meta-data
                android:name="android.support.FILE_PROVIDER_PATHS"
                android:resource="@xml/file_paths" />
        </provider>

Answer 1

 public void openImageChooser() {
    Intent cameraIntent = new Intent(android.provider.MediaStore.ACTION_IMAGE_CAPTURE);
    startActivityForResult(cameraIntent, CAMERA_REQUEST);
}

点击按钮打开相机..

  public void onActivityResult(int requestCode, int resultCode, Intent data) 
  {

   if (requestCode == CAMERA_REQUEST && resultCode == Activity.RESULT_OK) {
        Bitmap photo = (Bitmap) data.getExtras().get("data");

        ((ImageView) findViewById(R.id.frontimg)).setImageBitmap(photo);
  }

在onActivityResult中获取位图并在ImageView中设置它

event.stopPropagation()

Answer 2

使用CameraIntent打开相机：

Intent cameraIntent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
    startActivityForResult(cameraIntent, 200);

在onActivityResult中获取捕获的图像：

public void onActivityResult(int requestCode, int resultCode, Intent data) {

    switch (requestCode) {

        case 200:

            if (resultCode == Activity.RESULT_OK) {

                if (data != null) {

                    Bitmap cameraImage = (Bitmap) data.getExtras().get("data");


                    imageView.setImageBitmap(cameraImage);

             }
            }
         }

尝试打开相机android崩溃？

2 个答案: