布局和图像机器人

Question

package com.example.paul_2.a5aprilie;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.view.View;
import android.view.animation.Animation;
import android.view.animation.AnimationUtils;
import android.widget.Button;
import android.widget.ImageView;
import android.widget.LinearLayout;
import android.widget.RelativeLayout;
public class MainActivity extends AppCompatActivity {
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        LinearLayout root = new LinearLayout(this);
        root.setOrientation(LinearLayout.VERTICAL);
        root.setLayoutParams(new LinearLayout.LayoutParams(LinearLayout.LayoutParams.MATCH_PARENT,LinearLayout.LayoutParams.MATCH_PARENT));
    setContentView(root);
    Button btn1= new Button(this);
    btn1.setText("Click Me");
    root.addView(btn1);
    LinearLayout linearContainer=new LinearLayout(this);
    linearContainer.setOrientation(LinearLayout.HORIZONTAL);
    linearContainer.setLayoutParams(new LinearLayout.LayoutParams(LinearLayout.LayoutParams.MATCH_PARENT,LinearLayout.LayoutParams.MATCH_PARENT));
    root.addView(linearContainer);
    final LinearLayout firstRow = new LinearLayout(this);
    firstRow.setOrientation(LinearLayout.VERTICAL);
    firstRow.setLayoutParams(new LinearLayout.LayoutParams(LinearLayout.LayoutParams.MATCH_PARENT,LinearLayout.LayoutParams.MATCH_PARENT));
    linearContainer.addView(firstRow);
    ImageView fiora = new ImageView(this);
    fiora.setBackgroundResource(R.drawable.fiora);
    ImageView katarina= new ImageView(this);
    katarina.setBackgroundResource(R.drawable.katarina);
    ImageView lb=new ImageView(this);
    lb.setBackgroundResource(R.drawable.lb);
    RelativeLayout.LayoutParams params1 = new RelativeLayout.LayoutParams(200,120);
  //  params1.leftMargin =0;
  //  params1.topMargin = 0;
    firstRow.addView(fiora,params1);
    firstRow.addView(katarina,params1);
    firstRow.addView(lb,params1);
    LinearLayout secondRow = new LinearLayout(this);
    secondRow.setOrientation(LinearLayout.VERTICAL);
    secondRow.setLayoutParams(new LinearLayout.LayoutParams(LinearLayout.LayoutParams.MATCH_PARENT,LinearLayout.LayoutParams.MATCH_PARENT));
    linearContainer.addView(secondRow);
    secondRow.addView(lb,params1);
    secondRow.addView(fiora,params1);
    secondRow.addView(katarina,params1);



    btn1.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            Animation animSlide = AnimationUtils.loadAnimation(getApplicationContext(),R.anim.slide);
            firstRow.startAnimation(animSlide);
        }
    });
}
}

我想将这些图像显示两次(以两种不同的布局(，但只工作"第一行"。当我尝试addView"第二行"中的图像时，我的应用程序崩溃了。有人可以解释我为什么以及如何这样做吗？

Answer 1

错误是第二行中添加的项目已附加。因此，您应该再次创建视图并将其添加到第二行。

此外，您应该像这样更改行的布局参数：

firstRow.setLayoutParams(new LinearLayout.LayoutParams(LinearLayout.LayoutParams.WRAP_CONTENT, LinearLayout.LayoutParams.WRAP_CONTENT));

也许您的线性布局方向有错误，因为现在有两列而不是行。

附言为什么不使用 xml 来实现此目的？