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我有一个listview在我的mainactivity调用数据库来填充它。当列表视图上的项目被点击时,它会开始一个新的活动,显示被点击的项目的细节。当按下后退按钮时,不再显示列表视图。ListView越来越被删除onbackpress
可能是什么问题?这是我主要活动的全部内容:
public class MainActivity extends ListActivity {
Button bAddMod;
private ModuleDB db;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
db = new ModuleDB(this);
db.open();
fillList();
db.close();
bAddMod = (Button) findViewById(R.id.btnAddMod);
bAddMod.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
Intent i = new Intent(MainActivity.this, AddModule.class);
startActivity(i);
}
});
}
private void fillList() {
ListView lv = getListView();
Cursor curs = db.getData();
startManagingCursor(curs);
MyCursorAdapter adapter = new MyCursorAdapter(getApplicationContext(), curs);
lv.setAdapter(adapter);
lv.setOnItemClickListener(new OnItemClickListener() {
public void onItemClick(AdapterView<?> parent, View view, int position, long id){
Intent k = new Intent(MainActivity.this, ModuleDetails.class);
k.putExtra("mod_id", id);
startActivity(k);
}
});
}
}
我刚加了下面的代码:'public void onResume(){fillList(); }但它不起作用 – adohertyd