Android拍照并保存（对图片进行压缩，分解）

转载：http://blog.csdn.net/gao_chun/article/details/40864121

具体功能：将拍摄的照片保存到SDcard中



具体需求：

1.图片名保存格式：图片名称_手机型号_随机4位数.jpg

2.将图片分解，压缩，显示
3.写入SDCard卡保存

具体实现：

1.定义布局文件
2.编写业务代码

这里只对调用相机拍照、图片显示、保存 做介绍 并提供源码下载

点击按钮后：

[java] view
plain copy

print?





@Override

public void onClick(View v) {

switch (v.getId()) {

case R.id.btn_getphoto:

mPhotoName = mETphotoName.getEditableText().toString();

mModel = mETmodel.getEditableText().toString();

if(TextUtils.isEmpty(mPhotoName) || TextUtils.isEmpty(mModel)){

Toast.makeText(this,"请输入图片名称和型号",0).show();

return;

}

final String state = Environment.getExternalStorageState();

if (Environment.MEDIA_MOUNTED.equals(state)) {

final Intent takePictureImIntent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);

ContentValues values = new ContentValues();

mPhotoUri = getContentResolver().insert(MediaStore.Images.Media.EXTERNAL_CONTENT_URI, values);

takePictureImIntent.putExtra(android.provider.MediaStore.EXTRA_OUTPUT, mPhotoUri);

startActivityForResult(takePictureImIntent,REQUEST_CODE_TAKE_PICTURE);

} else {

Toast.makeText(this,"请检查内存卡", 0).show();

}

break;

default:

break;

}

}

onActivityResult回调：

[java] view
plain copy

print?





/* (non-Javadoc)

* @see android.app.Activity#onActivityResult(int, int, android.content.Intent)

*/

@Override

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

switch (requestCode) {

case REQUEST_CODE_TAKE_PICTURE:

// 通过照相获取图片

if (resultCode == Activity.RESULT_OK) {

final Uri uri = mPhotoUri;

Log.e("MainActivity",uri+"");

if (uri != null) {

processPicture(uri);

}

//提示保存图片

AlertDialog.Builder builder = new AlertDialog.Builder(this);

builder.setTitle("提示");

builder.setMessage("是否需要保存图片？");

builder.setNegativeButton("取消", null);

builder.setPositiveButton("是的", new DialogInterface.OnClickListener() {

@Override

public void onClick(DialogInterface dialog, int which) {

String resetPhotoName = mPhotoName+"_"+mModel+"_"+Utils.getRandomString(4);

Utils.savePhotoToSDCard(bitmap,Utils.genProjectPath(),resetPhotoName);

Toast.makeText(MainActivity.this,"成功--->"+Utils.genProjectPath()+resetPhotoName,0).show();

//清空文本框

mETphotoName.setText("");

mETmodel.setText("");

dialog.cancel();

}

});

builder.show();

}

break;

default:

super.onActivityResult(requestCode, resultCode, data);

break;

}

}

图片显示：

[java] view
plain copy

print?





/**

* 图片显示

* @param uri

*/

private void processPicture(Uri uri) {

final String[] projection = {MediaStore.Images.Media.DATA};

final Cursor cursor = managedQuery(uri, projection, null, null, null);

cursor.moveToFirst();

final int columnIndex = cursor.getColumnIndexOrThrow(MediaStore.Images.Media.DATA);

String imagePath = cursor.getString(columnIndex);

Log.e("MainActivity",imagePath);

final String targetPath = BitmapUtils.toRegularHashCode(imagePath) + ".jpg";

BitmapUtils.compressBitmap(imagePath, targetPath, 640); //压缩

bitmap = BitmapUtils.decodeBitmap(imagePath, 150); //分解

mImage.setImageBitmap(bitmap); //显示

//上传服务器

//final AvatarUrlUpdateRequest request = new AvatarUrlUpdateRequest(REQUEST_ID_AVATAR_URL_UPDATE,mFileName,targetPath,mLoginResult);

//final LoginRequest request = new LoginRequest(0,"a@a.com","123456");

//genericDataManager.retrieveData(request, this);

}

源码下载地址：http://download.csdn.net/detail/gao_chun/8128717