第九篇 相對布局

相對布局空間既可以相對于父級容器定位，也可以相對于其他元件定位

package com.wang.learnlinearlayout;

import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.widget.RelativeLayout;
import android.widget.TextView;

public class RelativeActivity extends AppCompatActivity {

    private RelativeLayout relativeLayout;
    private TextView tv;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
//        setContentView(R.layout.activity_relative);
        relativeLayout = new RelativeLayout(this);
        setContentView(relativeLayout);

        tv = new TextView(this);
        tv.setText("textView");
        tv.setTextSize();

        RelativeLayout.LayoutParams rl = new RelativeLayout.LayoutParams(RelativeLayout.LayoutParams.WRAP_CONTENT,RelativeLayout.LayoutParams.WRAP_CONTENT);
        rl.topMargin = ;
        rl.leftMargin = ;

        relativeLayout.addView(tv,rl);
    }
}