Android使用系统自带的相机实现一键拍照功能

public class MainActivity extends AppCompatActivity {private static final int TAKE_PHOTO = 100;private ImageView iv; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); iv = (ImageView) findViewById(R.id.iv); }public void btn(View view) { switch (view.getId()){  case R.id.button:   //跳转到拍照的意图   Intent takePhotoIntent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);   //判断系统中是否有照相机   if (takePhotoIntent.resolveActivity(getPackageManager())!=null){    startActivityForResult(takePhotoIntent,TAKE_PHOTO);   }   break; }}/** * 处理数据 * @param requestCode * @param resultCode * @param data */@Overrideprotected void onActivityResult(int requestCode, int resultCode, Intent data) { super.onActivityResult(requestCode, resultCode, data); //判断请求码和返回码 if (requestCode==TAKE_PHOTO&&resultCode==RESULT_OK){  Bitmap bitmap = data.getParcelableExtra("data");  iv.setImageBitmap(bitmap); }}}