（权限）
<uses-permission android:name="android.permission.INTERNET" /> <uses-permission android:name="android.permission.CAMERA" /> <uses-feature android:name="android.hardware.camera" /> <uses-feature android:name="android.hardware.camera.autofocus" /> <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" /> <uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE"/>（布局）
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:app="http://schemas.android.com/apk/res-auto" xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent" android:layout_height="match_parent" android:orientation="vertical" tools:context="zhangyanran20181023.bwie.com.login.PaiActivity"> <ImageView android:src="@mipmap/ic_launcher" android:id="@+id/img" android:layout_width="wrap_content" android:layout_height="wrap_content" /> <Button android:text="拍照" android:id="@+id/paizhao" android:layout_width="match_parent" android:layout_height="wrap_content" /> <Button android:text="相册" android:id="@+id/xc" android:layout_width="match_parent" android:layout_height="wrap_content" /> </LinearLayout>（activity代码）
public class PaiActivity extends AppCompatActivity { Button paizhao, xc; ImageView img; //定义一个私有的变量来拍照回调 private String path; //定义静态变量来记录相册 private static final int IMAGE = 1; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_pai); img = findViewById(R.id.img); paizhao = findViewById(R.id.paizhao); xc = findViewById(R.id.xc); paizhao.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View view) { path= Environment.getExternalStorageDirectory().getPath()+"/"+System.currentTimeMillis()+".jpg"; Uri uri=Uri.fromFile(new File(path));//处理存放位置 Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);//创建拍照的意图 intent .putExtra(MediaStore.EXTRA_OUTPUT, uri);//指定处理方的位置为系统的沼泽的存放位置 startActivityForResult(intent, 1); } }); //调用相册的相片回传 xc.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View view) { Intent intent = new Intent(Intent.ACTION_PICK, android.provider.MediaStore.Images.Media.EXTERNAL_CONTENT_URI); startActivityForResult(intent,IMAGE); } }); } // 进行的相册里面来获得code来判断 // 调用相册 @Override public void onActivityResult(int requestCode, int resultCode, Intent data) { super.onActivityResult(requestCode, resultCode, data); // 调用相机拍照 把相机拍的照传回 该图片的控件 Uri uri = Uri.fromFile(new File(path)); img.setImageURI(uri); //获取图片路径 if (requestCode == IMAGE && resultCode == Activity.RESULT_OK && data != null) { Uri selectedImage = data.getData(); String[] filePathColumns = {MediaStore.Images.Media.DATA}; Cursor c = getContentResolver().query(selectedImage, filePathColumns, null, null, null); c.moveToFirst(); int columnIndex = c.getColumnIndex(filePathColumns[0]); String imagePath = c.getString(columnIndex); showImage(imagePath); c.close(); } } private void showImage(String imaePath) { Bitmap bm = BitmapFactory.decodeFile(imaePath); img.setImageBitmap(bm); } } <ImageView android:layout_width="match_parent" android:layout_height="100dp" android:layout_alignParentBottom="true" android:layout_alignParentStart="true" android:layout_marginBottom="10dp" android:scaleX="3" android:scaleY="8" android:src="@drawable/y" />
