Intent调用系统拍照程序，返回图片太小的问题

Posted 2020-09-25 llguanli

之前採用的方式（返回的照片会被压缩，不能达到预期效果）：

Intent intent = new Intent();
Intent intent_camera = getPackageManager()
.getLaunchIntentForPackage("com.android.camera");
if (intent_camera != null) {
intent.setPackage("com.android.camera");
}
intent.setAction(MediaStore.ACTION_IMAGE_CAPTURE);
startActivityForResult(intent, 100);

回调：（在返回的data中区数据，然后保存，然后再拿到路径。这样图片是已经压缩了的）

@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
Log.d("TAG", "requestCode" + requestCode + " ,resultCode" + resultCode
+ data);
if (requestCode == 100 && resultCode == Activity.RESULT_OK
&& null != data) {
// 照相返回界面
String sdState = Environment.getExternalStorageState();
if (!sdState.equals(Environment.MEDIA_MOUNTED)) {
Toast.makeText(getApplicationContext(), "未找到SDK",
Toast.LENGTH_LONG).show();
Log.d("TAG", "sd card unmount");
return;
}
new DateFormat();
String name = DateFormat.format("yyyyMMdd_hhmmss",
Calendar.getInstance(Locale.CHINA))
+ ".jpg";
Log.d("TAG", "name.........." + name);
Bundle bundle = data.getExtras();
// 获取相机返回的数据，并转换为图片格式
Bitmap bitmap;
String filename = null;
bitmap = (Bitmap) bundle.get("data");
FileOutputStream fout = null;
// 定义文件存储路径
File file = new File("/sdcard/e_community/");
if (!file.exists()) {
file.mkdirs();
}
filename = file.getPath() + "/" + name;
try {
fout = new FileOutputStream(filename);
// 对图片进行压缩
bitmap.compress(Bitmap.CompressFormat.PNG, 100, fout);
// FileOutputStream outputStream = new FileOutputStream(filename); // 文件输出流  
//        outputStream.write(data); // 写入sd卡中  
//        outputStream.close(); // 关闭输出流  
} catch (FileNotFoundException e) {
e.printStackTrace();
} finally {
try {
fout.flush();
fout.close();
} catch (IOException e) {
e.printStackTrace();
}
}
Log.d("TAG", "相片路径" + filename);

}

解决图片太小的问题。就是在启动相机的时候设置好照片保存的路径以及名称，这样data中就不会返回数据而是null，这样就能够依据自己设置的路径已经设置的名称通过BitmapFactory.decodeFile(imageUrl.get(j),option);获取到照片。

启动代码例如以下：

private String camera_path = Environment.getExternalStorageDirectory().toString()+"/e_community/";保存的路径

private String camera_photo_name;//保存的名称

Uri mOutPutFileUri;

Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
File path1 = new File(PhotoUtil.camera_path);
 if(!path1.exists()){
  path1.mkdirs();
 }
 camera_photo_name=System.currentTimeMillis()+".png";
 File file = new File(path1,camera_photo_name);
 mOutPutFileUri = Uri.fromFile(file);
 intent.putExtra(MediaStore.EXTRA_OUTPUT, mOutPutFileUri);

 startActivityForResult(intent, 111);

回调：

@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
Log.d("TAG", "requestCode" + requestCode + " ,resultCode" + resultCode
+ data);
if (requestCode == 111&&resultCode==Activity.RESULT_OK) {
// 照相返回界面
String filename = PhotoUtil.camera_path+ "/" + camera_photo_name;
Log.d("TAG", "相片路径" + filename);

}

}