效果图

现在很多应用中都会要求用户上传一张图片来作为头像，首先我在这接收使用相机拍照和在相册中选择图片。接下来先上效果图：

实现代码

1. 布局文件：

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
    tools:context="com.gyq.cameraalbumtest.MainActivity">

    <Button
        android:id="@+id/btn_take_photo"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="take photo"/>

    <Button
        android:id="@+id/choose_from_album"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="choose from album"/>

    <ImageView
        android:id="@+id/iv_picture"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="center_horizontal"/>
</LinearLayout>

2. MainActivity.java逻辑代码：

public class MainActivity extends AppCompatActivity {
   
    public static final int TAKE_PHOTO = 1;
    public static final int CHOOSE_PHOTO = 2;
    private Button mTakePhoto, mChoosePhoto;
    private ImageView picture;
    private Uri imageUri;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
   
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        mTakePhoto = (Button) findViewById(R.id.btn_take_photo);
        mChoosePhoto = (Button) findViewById(R.id.choose_from_album);
        picture = (ImageView) findViewById(R