Question

任何人都可以帮助我在这里我需要创建一个动态的ImageButton但我似乎无法让这个常规按钮工作，我在这一行上收到错误ll.addView(button,param);

package org.iimed.www;    
import org.iimed.www.R.layout;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.ImageButton;
import android.widget.LinearLayout;
import android.widget.RelativeLayout;
import android.widget.RelativeLayout.LayoutParams;
import android.app.Activity;
import android.content.Context;
import android.content.Intent;
import android.graphics.drawable.Drawable;

public class Penicillins extends Activity implements OnClickListener {

    ImageButton back,addmed;
    Context adaba;
    Drawable mmimed;

    public void onCreate(Bundle SavedInstanceState) {
        super.onCreate(SavedInstanceState);
        setContentView(R.layout.penicillin);
        back = (ImageButton) findViewById(R.id.back);
        addmed = (ImageButton) findViewById(R.id.addmed);
        back.setOnClickListener(this);
        addmed.setOnClickListener(this); 
    }

    public void onClick(View v) {
        switch (v.getId()) {
        case R.id.back:
            startActivity(new Intent(
                Penicillins.this, ImageTextListViewActivity.class));
            break;
        case R.id.addmed:
            RelativeLayout ll=(RelativeLayout)findViewById(R.id.sundayopen);
            setContentView(R.layout.sundayopen);

            Button button= new Button (this);
            LayoutParams param = new RelativeLayout.LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT);

            ll.addView(button,param);
        }
    }

错误：

01-07 18:49:59.299: E/AndroidRuntime(27389): at org.iimed.www.Penicillins.onClick(Penicillins.java:63)

Answer 1

变化：

            Button button= new Button (this);
            LayoutParams param = new RelativeLayout.LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT);


            ll.addView(button,param);

到

            Button button= new Button (this);
            LayoutParams param = new RelativeLayout.LayoutParams(LayoutParams.WRAP_CONTENT,LayoutParams.WRAP_CONTENT);
            button.setLayoutParams(param);


            ll.addView(button);

Answer 2

使用RelativeLayout.LayoutParams.WRAP_CONTENT代替LayoutParams.WRAP_CONTENT

和删除此setContentView(R.layout.sundayopen);行。

因为这在这里毫无意义。

最后在break;

之后加ll.addView(button,param);

尝试更改

LayoutParams param = new RelativeLayout.LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT);

要

RelativeLayout param = new RelativeLayout.LayoutParams(RelativeLayout.LayoutParams.WRAP_CONTENT, RelativeLayout.LayoutParams.WRAP_CONTENT);

动态按钮创建

2 个答案: