Android 获取本地图片

MainActivity.java

public class RegisterActivity extends AppCompatActivity {
    private ImageView iv;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_register);

        iv = (ImageView) findViewById(R.id.iv_hand);
        iv.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                Intent intent = new Intent(Intent.ACTION_PICK,null);
                intent.setDataAndType(MediaStore.Images.Media.EXTERNAL_CONTENT_URI,"image/*");
                startActivityForResult(intent,100);
            }
        });
    }

    @Override
    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
        super.onActivityResult(requestCode, resultCode, data);
        if (resultCode == RESULT_OK && requestCode == 100) {
            if (data != null) {
                iv.setImageURI(data.getData());
            }
        }
    }
}