首先在 AndroidManifest.xml 创建一个权限,代码如下
<uses-feature android:name="android.hardware.camera" />
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
然后为拍照按钮增加一个验证权限的监听
btnCamera.setOnClickListener(v -> {
if (ContextCompat.checkSelfPermission(MainActivity.this, Manifest.permission.CAMERA)
!= PackageManager.PERMISSION_GRANTED) {
ActivityCompat.requestPermissions(MainActivity.this, new String[]{Manifest.permission.CAMERA},
REQUEST_CAMERA_PERMISSION);
}
接着增加一个打开相机的方法
private void openCamera() {
Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
if (intent.resolveActivity(getPackageManager()) != null) {
startActivityForResult(intent, REQUEST_IMAGE_CAPTURE);
}
}
接着为打开的intent做一个响应
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
if (requestCode == REQUEST_IMAGE_CAPTURE && resultCode == RESULT_OK) {
Bundle extras = data.getExtras();
if (extras != null) {
imageBitmap = (Bitmap) extras.get("data");
imageView.setVisibility(View.VISIBLE);
imageView.setImageBitmap(imageBitmap);
}
}
保存图片的方法
public void saveImageToGalleryQ(Bitmap image) {
String mImageFileName = photoname.getText().toString() + "_" + getDateTime();
ContentValues values = new ContentValues();
values.put(MediaStore.MediaColumns.DISPLAY_NAME, mImageFileName);
values.put(MediaStore.Images.Media.MIME_TYPE, "image/jpeg");
ContentResolver contentResolver = getContentResolver();
try {
// 将Bitmap保存到相册
Uri photouri = contentResolver.insert(uri, values);
if (photouri != null) {
// 获取输出流
android.os.ParcelFileDescriptor parcelFileDescriptor = contentResolver.openFileDescriptor(photouri, "w");
if (parcelFileDescriptor != null) {
java.io.FileOutputStream fileOutputStream = new java.io.FileOutputStream(parcelFileDescriptor.getFileDescriptor());
image.compress(Bitmap.CompressFormat.JPEG, 100, fileOutputStream);
fileOutputStream.close();
parcelFileDescriptor.close();
}
Intent mediaScanIntent = new Intent(Intent.ACTION_MEDIA_SCANNER_SCAN_FILE);
mediaScanIntent.setData(photouri);
sendBroadcast(mediaScanIntent);
}
} catch (Exception e) {
e.printStackTrace();
}
}