需要动态申请的权限:

危险权限列表

需求:现在要调用照相机照照片做头像-_-
以下代码是根据鸿洋大神的Demo沾的, 做以后开发时忘了可以回头看看
public class MainActivity extends AppCompatActivity {

private Button id_btn_callphone;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    id_btn_callphone = (Button) findViewById(R.id.id_btn_callphone);
    id_btn_callphone.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            if (ContextCompat.checkSelfPermission(MainActivity.this,
                    Manifest.permission.CALL_PHONE)
                    != PackageManager.PERMISSION_GRANTED) {

                ActivityCompat.requestPermissions(MainActivity.this,
                        new String[]{Manifest.permission.CALL_PHONE},
                        1);
            } else {
                callPhone();
            }
        }
    });
}

/**
 * 打电话
 */
private void callPhone() {
    Intent intent = new Intent(Intent.ACTION_CALL);
    Uri data = Uri.parse("tel:" + "10086");
    intent.setData(data);
    startActivity(intent);
}

@Override
public void onRequestPermissionsResult(int requestCode, String[] permissions, int[] grantResults)
{

    if (requestCode == 1)
    {
        if (grantResults[0] == PackageManager.PERMISSION_GRANTED)
        {
            callPhone();
        } else
        {
            // Permission Denied
            Toast.makeText(MainActivity.this, "Permission Denied", Toast.LENGTH_SHORT).show();
        }
        return;
    }
    super.onRequestPermissionsResult(requestCode, permissions, grantResults);
}

}

下面几部记录了我动态申请权限的步骤
1, 拨打电话时检查权限
2, 有就拨打电话; 若是没有的话就申请权限
3, 权限申请的回调在onRequestPermissionsResult 这个方法中执行, 这时若是用户同意, 那就有权限, 拨打电话, 用户不同意, 只能弹toast提示没权限拨打不了...

我拿oppoA57手机测试(6.0.1系统), 一切正常..