[英]Android ListView Problems Loading App
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_home_screen);
String[] myHouses = new String[8];
myHouses[0] = "Hello0";
myHouses[1] = "Hello1";
myHouses[2] = "Hello2";
myHouses[3] = "Hello3";
myHouses[4] = "Hello4";
myHouses[5] = "Hello5";
myHouses[6] = "Hello6";
myHouses[7] = "Hello7";
ArrayList<String> myHousesList =new ArrayList<>(Arrays.asList(myHouses));
ListAdapter grumpyAdapter = new ArrayAdapter<String>(this, android.R.layout.simple_list_item_1, myHousesList);
ListView grumpyListView = (ListView) findViewById(R.id.grumpyListView);
grumpyListView.setAdapter(grumpyAdapter);
grumpyListView.setOnItemClickListener(
new AdapterView.OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
String myHouse = String.valueOf(parent.getItemAtPosition(position));
Toast.makeText(HomeScreen.this, myHouse, Toast.LENGTH_LONG).show();
}
}
);
}
} }
Moved my error to this line: null pointer exception again: ListView grumpyListView = (ListView) findViewById(R.id.grumpyListView); 我的错误移至此行:再次出现空指针异常:ListView grumpyListView =(ListView)findViewById(R.id.grumpyListView);
如错误消息所述,您的布局有问题,无法进行夸大,请检查相应的xml布局文件。
Instead of an ListAdapter try ArrayAdapter 代替ListAdapter尝试ArrayAdapter
ArrayList<String> myHousesList=new ArrayList<>(Arrays.asList(myHouses));
ArrayAdapter<String> grumpyAdapter = new ArrayAdapter<String>(this, android.R.layout.simple_list_item_1, myHousesList);
ListView grumpyListView = (ListView) findViewById(R.id.grumpyListView);
grumpyListView.setAdapter(grumpyAdapter);
Try this 尝试这个
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