标签: android-camera-intent

我在我的应用程序中使用相机.我只是intent用来启动相机

Intent cameraIntent = new Intent(android.provider.MediaStore.ACTION_IMAGE_CAPTURE);
        cameraIntent.putExtra(MediaStore.EXTRA_OUTPUT, outputFileUri);
        startActivityForResult(cameraIntent, 101);

捕获的图像自动进入landscape view.如何camera捕获图像portrait view

使用Android相机Intent拍照时,我得到的是低质量的位图图像.我想知道是否有可能使这个图像体面的质量.

我搜索了一些有关它的信息,我认为我必须使用'EXTRA_OUTPUT'(http://developer.android.com/reference/android/provider/MediaStore.html#ACTION_IMAGE_CAPTURE)

我正在努力,因为我不知道放在哪里,我不知道它是否能解决我的问题.

按btnTakePhoto后,我改变布局并打开Android摄像头.位图以第二种布局(低质量)显示.这是我的代码:

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.ImageButton;
import android.widget.ImageView;

public class Camera extends AppCompatActivity {
    ImageButton btnTakePhoto;
    ImageView imgTakenPhoto;
    private static final int CAM_REQUEST = 1313;

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

        btnTakePhoto = (ImageButton) findViewById(R.id.buttonFoto);
        imgTakenPhoto = (ImageView) findViewById(R.id.genomenFoto);


    btnTakePhoto.setOnClickListener(new btnTakePhotoClicker());
}
    @Override
    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
        super.onActivityResult(requestCode, resultCode, data);

        if(requestCode == CAM_REQUEST){
            setContentView(R.layout.share);
            Bitmap thumbnail = …

我的问题是,每次我选择第三方相机应用程序,例如Beauty Plus Camera我每次都有空指针异常,我的代码完全适用于默认的相机应用程序,它甚至可以与谷歌为摩托车系列手机制作的新相机配合使用.

第一次选择画廊或相机选项的对话框如下:

private void OpenDialogForImage() {

    final CharSequence[] items = {
            "Gallary", "Camera", "Cancel"
    };

    AlertDialog.Builder builder = new AlertDialog.Builder(activity);
    builder.setItems(items, new DialogInterface.OnClickListener() {
        public void onClick(DialogInterface dialog, int item) {
            // Do something with the selection
            switch (item) {
                case 0:
                    Intent intent1 = new Intent(
                            Intent.ACTION_PICK,
                            android.provider.MediaStore.Images.Media.EXTERNAL_CONTENT_URI);
                    intent1.setType("image/*");
                    startActivityForResult(
                            Intent.createChooser(intent1, "Select File"),
                            SELECT_FILE);
                    break;
                case 1:

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

                    break;
                case 2:

                    break;
            }
        }
    });
    AlertDialog alert = builder.create(); …

下面是我的代码但是没有给我onActivity结果中的图像路径

Uri selectedImageUri = data.getData();
                selectedImagePath = getPath(selectedImageUri);
                Log.w("jay", "Camera Image Path :" + selectedImagePath);

                Toast.makeText(MiscansOther_pannel.this, selectedImagePath,
                        Toast.LENGTH_LONG).show();

照片旋转90度,同时从三星移动其他手机(HTC)的相机捕捉其工作正常.请帮帮我.

Intent cameraIntent = new Intent(android.provider.MediaStore.ACTION_IMAGE_CAPTURE);
startActivityForResult(cameraIntent, IMAGE_CAPTURE); 

@Override 
 protected void onActivityResult(int requestCode, int resultCode, Intent data) {     
    super.onActivityResult(requestCode, resultCode, data);    
      try
    {
    if (requestCode == IMAGE_CAPTURE) {
       if (resultCode == RESULT_OK){

       Uri contentUri = data.getData();
       if(contentUri!=null)
       {
        String[] proj = { MediaStore.Images.Media.DATA };         
            Cursor cursor = managedQuery(contentUri, proj, null, null, null);         
        int column_index = cursor.getColumnIndexOrThrow(MediaStore.Images.Media.DATA);         
        cursor.moveToFirst();         
        imageUri = Uri.parse(cursor.getString(column_index));
       }

       tempBitmap = (Bitmap) data.getExtras().get("data"); 
       mainImageView.setImageBitmap(tempBitmap);
       isCaptureFromCamera = true;
    }
 }

我目前正在编写一个Android应用程序(API级别2.3.3),其中涉及从通过相机意图拍摄的照片中获取300个最高灰度值.接下来,对结果值执行函数(主要是数学和一些基于日历/时钟).我正在使用Eclipse /模拟相机.

相机将启动和拍照之间没有问题,那就是当我试图保存照片(当像素排序和数学/日历功能将发生),应用程序崩溃.

我用相机意图和主变量(Y)的'虚拟'值测试了应用程序,这很好用.

出了什么问题？

以下是相关的代码部分:

int[] pixels;   


    Button button = (Button) findViewById(R.id.button);

    button.setOnClickListener(new View.OnClickListener() {

        @Override
        public void onClick(View v) {

            String _path = Environment.getExternalStorageDirectory() + File.separator + "sunpic.jpg";
            File file = new File(_path);
            Uri outputFileUri = Uri.fromFile(file);
            Intent intent = new Intent(
            android.provider.MediaStore.ACTION_IMAGE_CAPTURE);
            intent.putExtra(MediaStore.EXTRA_OUTPUT, outputFileUri);
            startActivityForResult(intent, 1);

            }

    });
}

@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
    super.onActivityResult(requestCode, resultCode, data);
        switch(requestCode) {
            case (1): {
                if (resultCode == RESULT_OK) {
                    Uri outputFileUri = data.getData();
                    try …

我试图从相机中获取图像并将其直接保存到我的应用程序的私人文件目录中.出于安全考虑,图像不应随时公开访问.

通常,您授予对私有文件的临时访问权限的方式是使用ContentProvider并在Intent中设置GRANT_WRITE_URI_PERMISSION标志.按照FileProvider中的文档,我完成了以下操作:

AndroidManfiest.xml

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

RES/XML/file_paths.xml

<paths xmlns:android="http://schemas.android.com/apk/res/android">
    <files-path name="my_images" path="images/"/>
</paths>

启动相机活动时,我从活动中执行以下操作:

File imageFile = getInternalImageFile();
Uri captureUri = FileProvider.getUriForFile(this, "com.my.domain", imageFile);

Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);

// grant temporary access to the file
intent.setData(captureUri);
intent.addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION);
intent.addFlags(Intent.FLAG_GRANT_WRITE_URI_PERMISSION);

// tell the camera where to save the file
intent.putExtra(MediaStore.EXTRA_OUTPUT, captureUri);

startActivityForResult(intent, IMAGE_CAPTURE_REQUEST_CODE);

然而,这导致相机应用程序立即返回而不做任何事情.我怀疑因为它不期望在intent上有任何数据集(Intent.setData()).

上述策略运作得不是很好.那么,如何将从相机捕获的图像直接安全地保存到我应用程序的私人文件目录中？

友

我这么长时间面对这个问题,但是我能够得到任何解决方案来在模拟器中使用相机.我已经完成了SO的所有答案,但现在没有人帮助我.

如果我用任何api创建任何模拟器,但我的模拟器相机应用程序都不起作用.所以我无法测试任何包含相机功能的应用程序.我想可能是它的发生,因为我的系统的硬件配置.但我不确定.

我不知道为什么会出现这个问题.请帮我解决并找出问题的原因.

这是我在模拟器中启动相机时得到的错误.

12-21 00:04:58.100: E/CameraService(55): CameraService::connect X (pid 2604) rejected (invalid cameraId 0).
12-21 00:04:58.110: W/CameraBase(2604): An error occurred while connecting to camera: 0
12-21 00:04:58.110: E/CameraHolder(2604): fail to connect Camera
12-21 00:04:58.110: E/CameraHolder(2604): java.lang.RuntimeException: Fail to connect to camera service
12-21 00:04:58.110: E/CameraHolder(2604):   at android.hardware.Camera.native_setup(Native Method)
12-21 00:04:58.110: E/CameraHolder(2604):   at android.hardware.Camera.<init>(Camera.java:350)
12-21 00:04:58.110: E/CameraHolder(2604):   at android.hardware.Camera.open(Camera.java:309)
12-21 00:04:58.110: E/CameraHolder(2604):   at com.android.camera.CameraHolder.open(CameraHolder.java:131)
12-21 00:04:58.110: E/CameraHolder(2604):   at com.android.camera.Util.openCamera(Util.java:267)
12-21 00:04:58.110: E/CameraHolder(2604):   at com.android.camera.Camera$4.run(Camera.java:1100)
12-21 00:04:58.110: E/CameraHolder(2604):   at java.lang.Thread.run(Thread.java:841) …

我必须启动相机,当用户完成图片时,我必须将其拍摄并在视图中显示.

看看http://developer.android.com/guide/topics/media/camera.html我做了:

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

        bLaunchCamera = (Button) findViewById(R.id.launchCamera);
        bLaunchCamera.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                Log.d(TAG, "lanzando camara");

                //create intent to launch camera
                Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);

                imageUri = getOutputMediaFileUri(MEDIA_TYPE_IMAGE); //create a file to save the image
                intent.putExtra(MediaStore.EXTRA_OUTPUT, imageUri); //set the image file name

                //start camera
                startActivityForResult(intent, CAMERA_REQUEST);
            }
        });

/**
     * Create a File Uri for saving image (can be sued to save video to)
     **/
    private Uri getOutputMediaFileUri(int …

在我的应用程序中,捕获按钮用于使用设备摄像头捕获图像,因此我在该按钮的单击事件上使用了方法captureImage().当我单击按钮时,抛出空指针异常.我无法理解发生这种事可以有人帮忙吗 提前致谢!

在Create()方法上捕获按钮

photoButton.setOnClickListener(new View.OnClickListener() {

        @Override
        public void onClick(View v) {
            /*
            Intent cameraIntent = new Intent(android.provider.MediaStore.ACTION_IMAGE_CAPTURE);
            startActivityForResult(cameraIntent, CAMERA_REQUEST);*/
            captureImage();
        }
    });

captureImage()方法

private void captureImage() {
    Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);

    fileUri = getOutputMediaFileUri(MEDIA_TYPE_IMAGE);

    intent.putExtra(MediaStore.EXTRA_OUTPUT, fileUri);

    // start the image capture Intent
    startActivityForResult(intent, CAMERA_REQUEST);
}

此方法上的空指针异常

  public Uri getOutputMediaFileUri(int type) {
    return Uri.fromFile(getOutputMediaFile(type));
}

/**
 * returning image / video
 */
private static File getOutputMediaFile(int type) {

    // External sdcard location
    File mediaStorageDir = new File(
            Environment
                    .getExternalStoragePublicDirectory(Environment.DIRECTORY_PICTURES), …