我创建了一个ImageView,我可以看到Camera的预览并将捕获的图像加载到ImageView中,我想将图像存储到内部存储器的目录中。我已经推荐了许多帖子并试过但我无法在内存中找到我的图像。这是我用过的代码:
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);
}
}
我已经制作了许多日志消息进行调试,我找到了一条在手机中无法找到的路径。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: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:path 是/数据/用户/ 0 / com.example.shravan.camera / app_ImagesDir / myImagesDGS.jpg
08-07 21:47:37.099 11030-11030 / com.example.shravan.camera D / abc: 创造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
我需要检查一下,我应该改变吗?请帮忙!
答案 0 :(得分:4)
搞定了!
我使用此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&gt;设备&gt;应用程序&gt;应用程序管理器&gt;&#34;您的应用&#34;&gt;权限&gt;启用存储权限!
答案 1 :(得分:0)
您的图片正在保存此路径/data/user/0/com.example.shravan.camera/app_ImagesDir/myImagesDGS.jpg
但你不是access.try这个代码用于iamge阅读。将此方法调用到onCreate这个方法返回你的位图。
Bitmap mBitmap= getImageBitmap(this,"myImagesDGS","jpg");
if(mBitmap !=null){
yourImageView.setBitmap(mBitmap);
}else{
Log.d("MainActivity","Image is not found");
}
是sepread方法
public Bitmap getImageBitmap(Context context,String name,String extension){
name=name+"."+extension;
try{
FileInputStream fis = context.openFileInput(name);
Bitmap b = BitmapFactory.decodeStream(fis);
fis.close();
return b;
}
catch(Exception e){
}
return null;
}
答案 2 :(得分:0)
试试这个。我修改了我的代码以适合您提供的代码。我没有测试它。我将拍摄的照片临时存储到带有时间戳的文件中,然后使用文件名来检索文件。希望它有所帮助
_textView.textContainerInset = UIEdgeInsetsZero;
_textView.textContainer.lineFragmentPadding = 0;
答案 3 :(得分:0)
使用该代码,您将结束将文件存储到私人应用程序数据。 除了没有root权限的应用程序本身之外,您无法使用其他应用程序访问该数据。如果您希望其他应用程序可以访问您的图像文件,则可以在声明文件路径时使用此代码来获取公共映像目录。
File albumF;
if (Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED)) {
albumF = Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_DCIM);
} else {
albumF = context.getFilesDir();
}
如果您需要在子公共图库目录中创建子目录,可以像这样更改上面的代码:
File albumF;
if (Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED)) {
albumF = new File(Environment.getExternalStoragePublicDirectory(
Environment.DIRECTORY_DCIM), YOUR_SUB_DIRECTORY_STRING);
} else {
albumF = new File(context.getFilesDir(), YOUR_SUB_DIRECTORY_STRING);
}
您可能需要添加此代码才能创建该专辑目录
if (!albumF.exists()) {
albumF.mkdirs();
}
答案 4 :(得分:0)
当前图片保存的位置无法被其他应用程序访问。最好将它们保存在可访问的位置。就像这样..
BitmapDrawable drawable = (BitmapDrawable) iv.getDrawable();
Bitmap bitmap = drawable.getBitmap();
try {
String root = Environment.getExternalStorageDirectory().toString();
File file = new File(root + "/YourDirectory/myImagesDGS.jpg");
FileOutputStream out = new FileOutputStream(file);
bitmap.compress(Bitmap.CompressFormat.PNG, 100, out);
out.flush();
out.close();
} catch (Exception ex) {
ex.printStackTrace();
}
然后你可以像这样检索你保存的图像..
String root = Environment.getExternalStorageDirectory().toString();
File file = new File(root + "/YourDirectory/myImagesDGS.jpg");
Bitmap bmap=BitmapFactory.decodeFile(file.getAbsolutePath());
答案 5 :(得分:0)
尝试使用ImageSaver。它是从内部和外部存储保存和加载图像的同步方式。
保存:
new ImageSaver(context).
setFileName("myImage.png").
setDirectoryName("images").
setExternal(true).
save(bitmap);
加载:
Bitmap bitmap = new ImageSaver(context).
setFileName("myImage.png").
setDirectoryName("images").
setExternal(true).
load();
答案 6 :(得分:0)
@Shravan DG 提出的解决方案给我带来了错误。我对他的代码做了一点修改,并且没有错误。
private void downloadQR()
{
FileOutputStream outStream = null;
try {
String timeStamp = new SimpleDateFormat("yyyyMMdd_HHmmss").format(new Date());
String imageFileName = "QRCode_" + timeStamp + ".jpg";
File storageDir = new File(Environment.getExternalStorageDirectory().toString(), "PARENT_DIR)/CHILD_DIR/");
storageDir.mkdirs();
File outFile = new File(storageDir, imageFileName);
outStream = new FileOutputStream(outFile);
BitmapDrawable drawable = (BitmapDrawable) qrCode.getDrawable();
Bitmap bitmap = drawable.getBitmap();
bitmap.compress(Bitmap.CompressFormat.JPEG, 100, outStream);
outStream.flush();
outStream.close();
Log.d(TAG, "onPictureTaken - wrote to " + outFile.getAbsolutePath());
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
} finally {
}
}
冷静丸:)