Question

我有这段代码：

package com.shipwreckt;

import android.content.Context;
import android.util.AttributeSet;
import android.view.ViewGroup;
import android.widget.LinearLayout;


/**
 * TODO: document your custom view class.
 */
public class GridBoard extends LinearLayout {

    Context c;



    public GridBoard(Context context){
        this(context,null);
    }

    public GridBoard(Context context,AttributeSet as){
        super(context,as);
        c=context;
        init();

    }

    void init(){
        this.setBackgroundColor(0xFF006600);
        this.setLayoutParams(new LayoutParams(LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.MATCH_PARENT));

        for(int a=0;a<10;a++){
            LinearLayout base=createRow();
                for(int b=0;b<10;b++) {
                    base.addView(createPlace());
                }
            this.addView(base);
        }

    }

    LinearLayout createPlace(){
        LinearLayout ll=new LinearLayout(c){
            public int z;
        };
        ll.setOrientation(HORIZONTAL);
        ll.setPadding(2,2,2,2);
        ll.setLayoutParams(new LayoutParams(0, LayoutParams.MATCH_PARENT));
        ll.setBackgroundColor(0xFFFF0000);
        ll.setWeightSum(1);

        return ll;
    }

    LinearLayout createRow(){
        LinearLayout ll=new LinearLayout(c);
        ll.setOrientation(VERTICAL);
        //ll.setWeightSum(1);
        ll.setLayoutParams(new LayoutParams(LayoutParams.MATCH_PARENT, LayoutParams.MATCH_PARENT));
        ll.setBackgroundColor(0xFFFF0000);
        return ll;
    }

    @Override
    protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
        setMeasuredDimension( (widthMeasureSpec>heightMeasureSpec?heightMeasureSpec:widthMeasureSpec) , (widthMeasureSpec>heightMeasureSpec?heightMeasureSpec:widthMeasureSpec));
    }
}

问题是，当我执行它时，我只得到绿色方块（按照我的计划），但没有任何布局应该在里面并创建一个漂亮的网格。你知道为什么吗？我试图在课堂之外添加文本字段，但它也完全失败了。

只是一些启动代码，以显示正在发生的事情：

package com.shipwreckt;

import android.os.Bundle;
import android.support.v7.app.ActionBarActivity;
import android.view.Menu;
import android.view.MenuItem;
import android.widget.TextView;


public class Shipwreckt extends ActionBarActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        //setContentView(R.layout.activity_shipwreckt);
        GridBoard gridBoard=new GridBoard(this);

        TextView tv=new TextView(this);
        tv.setText("Problem");
        gridBoard.addView(tv);
        setContentView(gridBoard);

    }


    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        // Inflate the menu; this adds items to the action bar if it is present.
        getMenuInflater().inflate(R.menu.menu_shipwreckt, menu);
        return true;
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        // Handle action bar item clicks here. The action bar will
        // automatically handle clicks on the Home/Up button, so long
        // as you specify a parent activity in AndroidManifest.xml.
        int id = item.getItemId();

        //noinspection SimplifiableIfStatement
        if (id == R.id.action_settings) {
            return true;
        }

        return super.onOptionsItemSelected(item);
    }
}

Answer 1

我意识到onMesure做了更复杂的计算，所以我修改了它：

@Override
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {

    super.onMeasure( (widthMeasureSpec>heightMeasureSpec?heightMeasureSpec:widthMeasureSpec) , (widthMeasureSpec>heightMeasureSpec?heightMeasureSpec:widthMeasureSpec));
}

现在它完美无缺

自定义线性布局在添加视图时遇到问题

1 个答案: