无论点击哪个按钮，都显示"频道0"

[YXTS122]

public class Gridview2Adapter extends BaseAdapter {
	Context context;
	TextView tv;
private List list;
public Gridview2Adapter(Context context,List<String> list,TextView textview){
	this.context=context;
this. list=list;
tv=textview;
}
@Override
public int getCount() {
return list.size();//按钮的个数
}

@Override
public Object getItem(int arg0) {
return list.get(arg0);
}

@Override
public long getItemId(int arg0) {
return arg0;
}

@Override
public View getView(int position, View convertview, ViewGroup arg2) {
//初始化View
	
	Button bt;
    if (convertview==null)
    {
    	convertview=new Button(context);
    	convertview.setLayoutParams(new GridView.LayoutParams(100,100));
    	//convertview.setPadding(4, 4, 4, 4);
    }
        bt=(Button)convertview;

      //处理数据String item=list.get(position);
String item=(String)getItem(position);
bt.setText(item);
bt.setOnClickListener(new OnClickListener(){
	public void onClick(View v)
	{
		Toast.makeText(context,"按钮被按了", Toast.LENGTH_LONG).show();
		//tv.setText(item);
	}
});
tv.setText(item);
	
return convertview;
}
}
  

public class MainActivity extends Activity {
GridView gridview2;
TextView channel;
List<String> channel_band=new ArrayList<String>();
//设置按钮默认的文字
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);

setContentView(R.layout.activity_main);
channel=(TextView) findViewById(R.id.channel);
//初始化GridView
gridview2=(GridView)findViewById(R.id.gridview2);
gridview2.setOnItemClickListener(new OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View view, int position,
long id) {
String item=channel_band.get(position);
channel.setText(item);
Toast.makeText(MainActivity.this,item +"被点击", Toast.LENGTH_SHORT).show();
}
});
//初始化数据源
for(int j=0;j<19;j++){
channel_band.add("频道"+j);
}
//设置adapter
gridview2.setAdapter(new Gridview2Adapter(this,channel_band,channel));
gridview2.setNumColumns(5);

}
}  

[m-oj]

因为你adapter里给button设置了onClickListener，所已gridview的onitemClick无法响应

[SemiraChen]

写接口的方法不行嘛，我自己试过的

[m-oj]

public class Gridview2Adapter extends BaseAdapter { Context context; TextView tv; private List list; public Gridview2Adapter(Context context,List<String> list,TextView textview){ this.context=context; this. list=list; tv=textview; } @Override public int getCount() { return list.size();//按钮的个数 } @Override public Object getItem(int arg0) { return list.get(arg0); } @Override public long getItemId(int arg0) { return arg0; } @Override public View getView(int position, View convertview, ViewGroup arg2) { //初始化View TextView bt; if (convertview==null) { convertview=new TextView(context); convertview.setLayoutParams(new GridView.LayoutParams(100,100)); //convertview.setPadding(4, 4, 4, 4); } bt=(TextView)convertview; //处理数据String item=list.get(position); String item=(String)getItem(position); bt.setText(item); // bt.setOnClickListener(new View.OnClickListener(){ // public void onClick(View v) // { // Toast.makeText(context,"按钮被按了", Toast.LENGTH_LONG).show(); // //tv.setText(item); // } // }); // tv.setText(item); return convertview; } } 给你改了下adapter

[YXTS122]

3楼不是把我的19个button改成了19个TextView了？不是吧？

[m-oj]

button是可点击的，跟onItemClick有冲突，如果你还要通过onItemClickListener，可以再Button外包一层Layout，然后Button设置为不可点击。或者不用onItemClickListener，点击逻辑都放到Button的onClickListener里面

[YXTS122]

tv.setText(item);就是因为把这句话放在按钮的点击事件onClick()里编译不通过，所以才不知道怎么办才好

[SemiraChen]

[m-oj]

引用 7 楼 YXTS122 的回复:

tv.setText(item);就是因为把这句话放在按钮的点击事件onClick()里编译不通过，所以才不知道怎么办才好

你定义个常量就好了啊 final a = tv; bt.setOnClickListener(new OnClickListener(){ public void onClick(View v) { Toast.makeText(context,"按钮被按了", Toast.LENGTH_LONG).show(); a.setText(item); } });

[YXTS122]

引用 10 楼 m-oj 的回复:

[quote=引用 7 楼 YXTS122 的回复:]
tv.setText(item);就是因为把这句话放在按钮的点击事件onClick()里编译不通过，所以才不知道怎么办才好

你定义个常量就好了啊
final a = tv;
bt.setOnClickListener(new OnClickListener(){
public void onClick(View v)
{
Toast.makeText(context,"按钮被按了", Toast.LENGTH_LONG).show();
a.setText(item);
}
});
[/quote]

应该这样改：

public View getView(int position, View convertview, ViewGroup arg2) {
//初始化View
    Button bt;
    if (convertview==null)
    {
        convertview=new Button(context);
        convertview.setLayoutParams(new GridView.LayoutParams(100,100));
        //convertview.setPadding(4, 4, 4, 4);
    }
        bt=(Button)convertview;
 
      //处理数据String item=list.get(position);
final String item=(String)getItem(position);
bt.setText(item);
bt.setOnClickListener(new OnClickListener(){
    public void onClick(View v)
    {
        Toast.makeText(context,"按钮被按了", Toast.LENGTH_SHORT).show();
        tv.setText(item);
 
    }
});
//tv.setText(item);
     
return convertview;
}