[移动开发]Android view.setX() view.setY() layoutParams.topMargin layoutParams.leftMargin

?onCreate中使用view.setX(380); view.setY(380);设置控件的位置，布局完成之后打印结果为:

onCreate中使用?layoutParams.topMargin = 380; layoutParams.leftMargin = 380;设置控件的位置，布局完成之后打印结果为:

测试代码如下

public class SecondActivity extends AppCompatActivity {

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

        FrameLayout flContainer = findViewById(R.id.fl_container);

        ImageView imageView = findViewById(R.id.image_view);

        FrameLayout.LayoutParams layoutParams = new FrameLayout.LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT,
                ViewGroup.LayoutParams.WRAP_CONTENT);
//        layoutParams.topMargin = 380;
//        layoutParams.leftMargin = 380;
        imageView.setLayoutParams(layoutParams);

        imageView.setX(380);
        imageView.setY(380);

        flContainer.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                FrameLayout.LayoutParams layoutParams1 = (FrameLayout.LayoutParams) imageView.getLayoutParams();
                Log.e("xxxxxxx", "leftMargin:" + layoutParams1.leftMargin + "---topMargin:" + layoutParams1.topMargin);
                Log.e("xxxxxxx", "getX:" + imageView.getX() + "---getY:" + imageView.getY());
            }
        });
    }

    public static void actionStart(Context context) {
        Intent intent = new Intent(context, SecondActivity.class);
        context.startActivity(intent);
    }
}

结论：在设置控件位置时，推荐使用 layoutParams.topMargin，layoutParams.leftMargin，能避免一些布局及动画相关的坑。