Android Studio 打开相册选择图片并展示（简单）

只是打开相册并选择图片展示，不涉及任何权限 。

activity_main.xml 代码

MainActivity.java 代码

public class MainActivity extends AppCompatActivity {

    private Button btn_2;
    private ImageView iv_image;
    @Override
    public void onCreate(@Nullable Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        Log.e(this.getClass().getName(), "onCreate");
        setContentView(R.layout.activity_main);
        btn_2 = findViewById(R.id.btn_2);
        iv_image = findViewById(R.id.iv_image);
        btn_2.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, 2);
            }
        });
    }
    @Override
    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
        super.onActivityResult(requestCode, resultCode, data);
        if (requestCode == 2) {
            // 从相册返回的数据
            Log.e(this.getClass().getName(), "Result:" + data.toString());
            if (data != null) {
                // 得到图片的全路径
                Uri uri = data.getData();
                iv_image.setImageURI(uri);
                Log.e(this.getClass().getName(), "Uri:" + String.valueOf(uri));
            }
        }
    }

}

效果图展示