将图像从ImageView保存到内部存储器 [英] Saving an image from ImageView into internal storage
问题描述
我已经创建了ImageView，可以看到相机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.我已经引用了很多帖子并尝试过，但是我在内存中找不到自己的图片.
I have created an ImageView and I can see the preview of the camera and load the captured image into the ImageView and I wanted to store the image into a directory in my internal memory. I have referred many posts and tried but I couldn't find my image in my internal memory.
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进行调试，并且得到了一条在手机中找不到的路径.
I have made many log messages to debug and I got one path which I couldn't find in my phone.
这是logcat:
08-07 21:47:37.089 11030-11030/com.example.shravan.camera D/abc: 创建cw 08-07
08-07 21:47:37.089 11030-11030/com.example.shravan.camera D/abc: Creating cw 08-07
21:47:37.089 11030-11030/com.example.shravan.camera D/abc:创建目录08-07
21:47:37.089 11030-11030/com.example.shravan.camera D/abc: Creating dir 08-07
21:47:37.099 11030-11030/com.example.shravan.camera D/abc:已创建 dir/data/user/0/com.example.shravan.camera/app_ImagesDir 08-07
21:47:37.099 11030-11030/com.example.shravan.camera D/abc: Created 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 是/data/user/0/com.example.shravan.camera/app_ImagesDir/myImagesDGS.jpg
21:47:37.099 11030-11030/com.example.shravan.camera D/abc: path is/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: creating fos
08-07 21:47:37.099 11030-11030/com.example.shravan.camera D/abc:压缩位图
08-07 21:47:37.099 11030-11030/com.example.shravan.camera D/abc: Compressing bitmap
08-07 21:47:42.589 11030-11030/com.example.shravan.camera D/abc:fos已关闭
08-07 21:47:42.589 11030-11030/com.example.shravan.camera D/abc: fos closed
我需要检查什么并且应该更改吗?请帮忙！
Is there anything I need to check and I should change? Please help!
推荐答案
让它正常工作！
我使用以下代码在文件存储中创建目录，然后存储图像:
I used this code to create a directory in my file storage and then store the image:
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"！
Go to Device Settings>Device>Applications>Application Manager>"your app">Permissions>Enable Storage permission!
这篇关于将图像从ImageView保存到内部存储器的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
