将图像从ImageView保存到内部存储器

Question

我已经创建了ImageView，可以看到Camera的预览并将捕获的图像加载到ImageView中，并且我想将图像存储到内存中的目录中。我已经推荐了许多帖子并尝试过，但是我在内部存储器中找不到图像。这是我使用的代码：

 package com.example.shravan.camera;

 import android.content.Context;
 import android.content.ContextWrapper;
 import android.content.Intent;
 import android.content.pm.PackageManager;
 import android.graphics.Bitmap;
 import android.graphics.drawable.BitmapDrawable;
 import android.net.Uri;
 import android.os.Bundle;
 import android.provider.MediaStore;
 import android.support.v7.app.AppCompatActivity;
 import android.util.Log;
 import android.view.View;
 import android.widget.Button;
 import android.widget.ImageView;

 import java.io.File;
 import java.io.FileOutputStream;
 import java.io.IOException;


 public class MainActivity extends AppCompatActivity {
  private final String TAG = "abc";


static final int REQUEST_IMAGE_CAPTURE =1 ;
ImageView iv;
Uri imageUri;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    Button btn = (Button)findViewById(R.id.myB);
    iv = (ImageView) findViewById(R.id.myIV);
    //disable the button if the user has no camera
    if(!hasCamera())
    {
        btn.setEnabled(false);
    }
}


public boolean hasCamera()
{

    return getPackageManager().hasSystemFeature(PackageManager.FEATURE_CAMERA_ANY);
}

//on click event handler that launches the camera
public void launchCamera(View v)
{
    Intent i = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
    startActivityForResult(i, REQUEST_IMAGE_CAPTURE);
}

@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
    if(requestCode == REQUEST_IMAGE_CAPTURE && resultCode == RESULT_OK)
    {
        imageUri=data.getData();
        iv.setImageURI(imageUri);;
    }
}

public void SaveFile(View v){
    BitmapDrawable drawable = (BitmapDrawable) iv.getDrawable();
    Bitmap bitmap = drawable.getBitmap();

    print("Creating cw");
    ContextWrapper cw = new ContextWrapper(this.getApplicationContext());
    print("Creating dir");
    File directory = cw.getDir("ImagesDir", Context.MODE_PRIVATE);
    print("Created dir" + directory);
    File mypath=new File(directory,"myImagesDGS.jpg");
    print("path is"+mypath);

    FileOutputStream fos = null;
    try {
        print("creating fos");
        fos = new FileOutputStream(mypath);
        print("Compressing bitmap");
        bitmap.compress(Bitmap.CompressFormat.PNG, 100, fos);
    } catch (Exception e) {
        e.printStackTrace();
    } finally {
        try {
            fos.close();
            print("fos closed");
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}

private void print(String str){
    Log.d(TAG, str);
}

}

我已经编写了许多日志消息来进行调试，并且得到了一条在手机中找不到的路径。这是logcat：

08-07 21：47：37.089 11030-11030 / com.example.shravan.camera D / abc：创建cw 08-07

21：47：37.089 11030-11030 / com.example.shravan.camera D / abc：创建目录08-07

21：47：37.099 11030-11030 / com.example.shravan.camera D / abc：创建的dir / data / user / 0 / com.example.shravan.camera / app_ImagesDir 08-07

21：47：37.099 11030-11030 / com.example.shravan.camera D / abc：路径为/data/user/0/com.example.shravan.camera/app_ImagesDir/myImagesDGS.jpg

08-07 21：47：37.099 11030-11030 / com.example.shravan.camera D / abc：创建fos

08-07 21：47：37.099 11030-11030 / com.example.shravan.camera D / abc：压缩位图

08-07 21：47：42.589 11030-11030 / com.example.shravan.camera D / abc：fos已关闭

我需要检查什么并且应该更改吗？请帮忙！

Answer 1

得到它的工作！

我使用以下代码在文件存储中创建目录，然后存储图像：

FileOutputStream outStream = null;

    // Write to SD Card
    try {
        File sdCard = Environment.getExternalStorageDirectory();
        File dir = new File(sdCard.getAbsolutePath() + "/camtest");
        dir.mkdirs();

        String fileName = String.format("%d.jpg", System.currentTimeMillis());
        File outFile = new File(dir, fileName);

        outStream = new FileOutputStream(outFile);
        bitmap.compress(Bitmap.CompressFormat.JPEG, 100, outStream);
        outStream.flush();
        outStream.close();

        Log.d(TAG, "onPictureTaken - wrote to " + outFile.getAbsolutePath());

        refreshGallery(outFile);
    } catch (FileNotFoundException e) {
        print("FNF");
        e.printStackTrace();
    } catch (IOException e) {
        e.printStackTrace();
    } finally {
    }

我的权限：

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

最后，最重要的是：

转到设备设置>设备>应用程序>应用程序管理器>“您的应用程序”>权限>启用存储权限！