implementation 'com.github.LuckSiege.PictureSelector:picture_library:v2.2.4'
使用
public class MainActivity extends AppCompatActivity {
ActivityMainBinding binding;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
binding=ActivityMainBinding.inflate(getLayoutInflater());
setContentView(binding.getRoot());
binding.btnPhoto.setOnClickListener(v -> {
//拍照
PictureSelector.create(MainActivity.this)
.openCamera(PictureMimeType.ofImage())
.forResult(PictureConfig.CHOOSE_REQUEST);
});
binding.btnPic.setOnClickListener(v -> {
//相册
PictureSelector.create(this)
.openGallery(PictureMimeType.ofImage())
.maxSelectNum(1)
.minSelectNum(1)
.imageSpanCount(4)
.selectionMode(PictureConfig.MULTIPLE)
.forResult(PictureConfig.CHOOSE_REQUEST);
});
}
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
switch (requestCode) {
case PictureConfig.CHOOSE_REQUEST:
// 图片选择结果回调
List<LocalMedia> images= PictureSelector.obtainMultipleResult(data);
for (LocalMedia image : images) {
String path = image.getPath();
Bitmap bitmap = BitmapUtil.getSmallBitmap(path);
binding.img.setImageBitmap(bitmap);
}
break;
}
}
}
Bitmap 工具类
public class BitmapUtil {
public static String compressImage(String filePath) {
//原文件
File oldFile = new File(filePath);
//压缩文件路径 照片路径/
String targetPath = oldFile.getPath();
int quality = 60;//压缩比例0-100
Bitmap bm = getSmallBitmap(filePath);//获取一定尺寸的图片
File outputFile = new File(targetPath);
try {
if (!outputFile.exists()) {
outputFile.getParentFile().mkdirs();
//outputFile.createNewFile();
} else {
// outputFile.delete();//需要注释否则 会删除 相册 原有的图片
}
FileOutputStream out = new FileOutputStream(outputFile);
bm.compress(Bitmap.CompressFormat.JPEG, quality, out);
out.close();
} catch (Exception e) {
e.printStackTrace();
return filePath;
}
return outputFile.getPath();
}
/**
* 根据路径获得图片信息并按比例压缩，返回bitmap
*/
public static Bitmap getSmallBitmap(String filePath) {
final BitmapFactory.Options options = new BitmapFactory.Options();
options.inJustDecodeBounds = true;//只解析图片边沿，获取宽高
BitmapFactory.decodeFile(filePath, options);
// 计算缩放比
options.inSampleSize = calculateInSampleSize(options, 1080, 1920);
// 完整解析图片返回bitmap
options.inJustDecodeBounds = false;
return BitmapFactory.decodeFile(filePath, options);
}
// 计算缩放比
public static int calculateInSampleSize(BitmapFactory.Options options,
int reqWidth, int reqHeight) {
final int height = options.outHeight;
final int width = options.outWidth;
int inSampleSize = 1;
if (height > reqHeight || width > reqWidth) {
final int heightRatio = Math.round((float) height / (float) reqHeight);
final int widthRatio = Math.round((float) width / (float) reqWidth);
inSampleSize = heightRatio < widthRatio ? heightRatio : widthRatio;
}
return inSampleSize;
}
public static Bitmap convertViewToBitmap(View view) {
view.measure(View.MeasureSpec.makeMeasureSpec(0, View.MeasureSpec.UNSPECIFIED), View.MeasureSpec.makeMeasureSpec(0, View.MeasureSpec.UNSPECIFIED));
view.layout(0, 0, view.getMeasuredWidth(), view.getMeasuredHeight());
view.buildDrawingCache();
Bitmap bitmap = view.getDrawingCache();
return bitmap;
}
}