1. 添加权限写入和相机：
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.CAMERA" />
2. 设置常量区分相册和相机
public final static int CAMERA_REQUEST_CODE = 0;
public final static int GALLERY_REQUEST_CODE = 1;
3. 相机拍照需要申请的权限
if (ContextCompat.checkSelfPermission(MainActivity.this,
Manifest.permission.WRITE_EXTERNAL_STORAGE)
!= PackageManager.PERMISSION_GRANTED) {
ActivityCompat.requestPermissions(MainActivity.this,
new String[]{Manifest.permission.WRITE_EXTERNAL_STORAGE},
CAMERA_REQUEST_CODE);
}else { //权限被授予
takePhoto();
｝
4.拍照方法的实现
private void takePhoto(){
Intent intent1 = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
PhotoPath = Environment.getExternalStorageDirectory() + File.separator + "photo.jpeg";
imageUri = FileProvider.getUriForFile(MainActivity.this,
MainActivity.this.getApplicationContext().getPackageName() +".my.provider",
new File(PhotoPath));
intent1.putExtra(MediaStore.EXTRA_OUTPUT, imageUri);
startActivityForResult(intent1, CAMERA_REQUEST_CODE);
}
5.打开相册方法的实现：
private void choosePhoto(){
Intent intent2 = new Intent(Intent.ACTION_PICK, null);
intentToPickPic.setDataAndType(MediaStore.Images.Media.EXTERNAL_CONTENT_URI, "image/jpeg");
startActivityForResult(intent2, GALLERY_REQUEST_CODE);
}
6.通过回调方法处理相册和拍照得到的图片：
@Override
public void onActivityResult(int requestCode, int resultCode, Intent data) {
if (resultCode == MainActivity.RESULT_OK) {
switch (requestCode) {
case CAMERA_REQUEST_CODE: {
try {
Bitmap bit = BitmapFactory.decodeStream(getContentResolver().openInputStream(imageUri));
} catch (Exception e) {
e.printStackTrace();
}
break;
}
case GALLERY_REQUEST_CODE: {
try {
imageUri = data.getData();
if(imageUri!=null) {
Bitmap bit = BitmapFactory.decodeStream(getContentResolver().openInputStream(imageUri));
}
} catch (Exception e) {
e.printStackTrace();
}
break;
}
}
}
super.onActivityResult(requestCode, resultCode, data);
}