<uses-permission android:name="android.permission.CAMERA" />
    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
    <uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />

    <uses-feature android:name="android.hardware.camera" />
    <uses-feature android:name="android.hardware.camera.autofocus" />

    <uses-permission android:name="android.permission.VIBRATE" />
    <uses-permission android:name="android.permission.WAKE_LOCK" />

<?xml version="1.0" encoding="utf-8"?>
<paths xmlns:android="http://schemas.android.com/apk/res/android">
    <external-path
        name="mypath"
        path="DCIM"></external-path>
</paths>

//相機拍照
img.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                Intent intent = new Intent();
                intent.setAction(MediaStore.ACTION_IMAGE_CAPTURE);
                path="/sdcard/DCIM/Camera/"+System.currentTimeMillis()+".jpg";
                Uri uriForFile = FileProvider.getUriForFile(Main3Activity.this, "com.example.zhoukao3", new File(path));
                intent.putExtra(MediaStore.EXTRA_OUTPUT,uriForFile);
                startActivityForResult(intent,111);
            }
        });
        //從圖庫獲取
        img.setOnLongClickListener(new View.OnLongClickListener() {
            @Override
            public boolean onLongClick(View v) {
                Intent intent = new Intent();
                intent.setAction(Intent.ACTION_PICK);
                intent.setType("image/*");
                startActivityForResult(intent,555);
                return true;
            }
        });
//將圖片存放在頭像位置

@Override
    protected void onActivityResult(int requestCode, int resultCode, @Nullable Intent data) {
        super.onActivityResult(requestCode, resultCode, data);
        if (requestCode==111&&resultCode== Activity.RESULT_OK){
            Glide.with(this).load(path).transform(new CircleCrop()).into(img);
        }else if (requestCode==555&&resultCode==Activity.RESULT_OK){
            Uri data1 = data.getData();
            Glide.with(this).load(data1).transform(new CircleCrop()).into(img);
        }
}