Android - 相机意图低位图质量 [英] Android - Camera intent low bitmap quality
问题描述
当使用安卓相机 Intent 拍照时,我得到一张低质量的位图图像.我想知道是否有可能使这张图片质量不错.
When taking a picture using the android camera Intent, I get a low-quality bitmap image. I was wondering if it is possible to make this image decent quality.
我在谷歌上搜索了一些关于它的信息,我认为我必须使用EXTRA_OUTPUT"(http://developer.android.com/reference/android/provider/MediaStore.html#ACTION_IMAGE_CAPTURE)
I googled some information about it and I think that I have to use 'EXTRA_OUTPUT' (http://developer.android.com/reference/android/provider/MediaStore.html#ACTION_IMAGE_CAPTURE)
我很挣扎,因为我不知道把它放在哪里,也不知道它是否能解决我的问题.
I am struggling because I don't know where to place it and I don't know if it will solve my problem.
按下 btnTakePhoto 后,我更改布局并打开 android 相机.位图显示在第二个布局中(低质量).这是我的代码:
After pressing btnTakePhoto, I change layout and open the android camera. The bitmap shows up in a second layout (low quality). Here is my code:
import android.content.Intent;
import android.graphics.Bitmap;
import android.provider.MediaStore;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.ImageButton;
import android.widget.ImageView;
public class Camera extends AppCompatActivity {
ImageButton btnTakePhoto;
ImageView imgTakenPhoto;
private static final int CAM_REQUEST = 1313;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.camera);
btnTakePhoto = (ImageButton) findViewById(R.id.buttonFoto);
imgTakenPhoto = (ImageView) findViewById(R.id.genomenFoto);
btnTakePhoto.setOnClickListener(new btnTakePhotoClicker());
}
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
if(requestCode == CAM_REQUEST){
setContentView(R.layout.share);
Bitmap thumbnail = (Bitmap) data.getExtras().get("data");
imgTakenPhoto = (ImageView) findViewById(R.id.genomenFoto);
imgTakenPhoto.setImageBitmap(thumbnail);
}
}
class btnTakePhotoClicker implements Button.OnClickListener {
@Override
public void onClick(View v) {
Intent cameraIntent = new Intent(android.provider.MediaStore.ACTION_IMAGE_CAPTURE);
startActivityForResult(cameraIntent, CAM_REQUEST);
}
}
//CameraShare layout -- back button - Go back to first layout
public void ibBackToPhotograph(View v) {
setContentView(R.layout.camera);
btnTakePhoto = (ImageButton) findViewById(R.id.buttonFoto);
btnTakePhoto.setOnClickListener(new btnTakePhotoClicker());
}
}
图像未保存在任何地方.接受后才能在facebook上发布(snapchat)
The image isn't saved anywhere. It's ment to be posted on facebook after you accept it (snapchat)
推荐答案
不要使用bitmap
,而是使用uri
.
ImageView imageView;
Uri image;
String mCameraFileName;
private void cameraIntent() {
StrictMode.VmPolicy.Builder builder = new StrictMode.VmPolicy.Builder();
StrictMode.setVmPolicy(builder.build());
Intent intent = new Intent();
intent.setAction(MediaStore.ACTION_IMAGE_CAPTURE);
Date date = new Date();
DateFormat df = new SimpleDateFormat("-mm-ss");
String newPicFile = df.format(date) + ".jpg";
String outPath = "/sdcard/" + newPicFile;
File outFile = new File(outPath);
mCameraFileName = outFile.toString();
Uri outuri = Uri.fromFile(outFile);
intent.putExtra(MediaStore.EXTRA_OUTPUT, outuri);
startActivityForResult(intent, 2);
}
@Override
public void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
if (resultCode == Activity.RESULT_OK) {
if (requestCode == 2) {
if (data != null) {
image = data.getData();
imageView.setImageURI(image);
imageView.setVisibility(View.VISIBLE);
}
if (image == null && mCameraFileName != null) {
image = Uri.fromFile(new File(mCameraFileName));
imageView.setImageURI(image);
imageView.setVisibility(View.VISIBLE);
}
File file = new File(mCameraFileName);
if (!file.exists()) {
file.mkdir();
}
}
}
}
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