SetImageDrawable列表视图 [英] SetImageDrawable in a list view

问题描述

在我的列表视图中，我想使它这样它会改变图像视图我所做的绘制，但我每次运行它​​时，我得到一个错误。

In my list view, I want to make it so that it will change the drawable in the image view i made, but I get an error every time I run it.

ImageView Player;
@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    Player = (ImageView)findViewById(R.id.bob);
    setListAdapter(new ArrayAdapter<String>(this, R.layout.pointguards, PointGuards));
    final ListView lv = getListView();
    lv.setTextFilterEnabled(true);
    lv.setOnItemClickListener(new OnItemClickListener() {
        public void onItemClick(AdapterView parent, View view, int position, long id) {
                    String item = (String) lv.getAdapter().getItem(position);
                    //decide how to launch `Intent` depending on `item`
                    if (item == "bob"){
                Intent intent = new Intent("com.example.nba.playerinfo");
                startActivity(intent);
                Player.setImageDrawable(R.drawable.joe);
        }
    };   

这完美运行，但是当我添加了setImageDrawable崩溃。
编辑：绘制，我想改变的是在我准备

This runs perfectly, but when I add the setImageDrawable it crashes. The drawable that I would like to change is in the intent that I am going to

推荐答案

您需要设置在活动图像绘制，你与你的<$ C $启动C>意图，而不是在的ListView 。你可以在 intent.putExtras（名，名称）传递的名称; 。然后在活动使用基于您从意图获取名称 setImageDrawable code>额外的费用。

You need to set the image drawable in the Activity that you are launching with your Intent, not in the ListView. You could pass the name in with intent.putExtras("name", name);. Then in the Activity use setImageDrawable based on the name that you get from the Intent extra.

修改：意图在活动检索数据>

Intent intent = getIntent();
String name = intent.getStringExtra("name");

然后像这样设置播放器的ImageView ：

if (name.equalsIgnoreCase("joe")
    Player.setImageDrawable(R.drawable.joe);

这篇关于SetImageDrawable列表视图的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！