android - ActivityThread.performLaunchActivity(ActivityThread$ActivityRecord, Intent )

Question

我收到此错误 ActivityThread.performLaunchActivity(ActivityThread$ActivityRecord, Intent) line: 2585 当我开始一个 Intent 时

public class SingleMenuItemActivity  extends Activity {

TextView lblName;
TextView lblyest;
TextView lbltoday;
TextView lblHigh;
TextView lblLow;
TextView lblChange;
TextView lblPcchange;

String name,yesterday,today,high,low,change,pcchange;
@Override
protected void onCreate(Bundle savedInstanceState) {
    // TODO Auto-generated method stub
    super.onCreate(savedInstanceState);
     setContentView(R.layout.single_list_item);



      lblName = (TextView) findViewById(R.id.name);
         lblyest = (TextView) findViewById(R.id.yesterday);
         lbltoday = (TextView) findViewById(R.id.today);
         lblHigh = (TextView) findViewById(R.id.high);
         lblLow = (TextView) findViewById(R.id.low);
         lblChange = (TextView) findViewById(R.id.change);
         lblPcchange = (TextView) findViewById(R.id.pcchange);  

         Intent in = getIntent();
         name = in.getStringExtra("name");;
         yesterday = in.getStringExtra("yesterday");
         today =in.getStringExtra("today");
         high =in.getStringExtra("high");
         low = in.getStringExtra("low");
         change = in.getStringExtra("change");
         pcchange =in.getStringExtra("pcchange");


      //Error doesnt happen when the lines below are commented
        lblName.setText((CharSequence)name.toString());
        lblyest.setText(yesterday.toString());
        lbltoday.setText(today.toString());
        lblHigh.setText(high.toString());
        lblLow.setText(low.toString());
        lblChange.setText(change.toString());
        lblPcchange.setText(pcchange.toString());  

}

我知道当我执行 settext() 函数时会触发错误，但我不知道如何修复它

Answer 1

您正在设置变量、lblName 和所有这些变量，以包含所有 subview ……但您是在类级别进行的。在布局膨胀之前，不会创建这些 View ，在读取的行中setContentView(R.layout.single_list_item);

，所以所有这些变量都设置为空。

在调用 setContentView() 后设置变量，看看结果如何。