将数据从一个Activity发送到另一个 - 不工作

Question

我有一个TO DO列表，当我在一个活动中选中复选框时，我希望复选框旁边的复选框和文本转到另一个活动。这是我的适配器：

public class MyItemAdapter extends ArrayAdapter<String> { 

private final Context context; 
private final String[] values; 

    public MyItemAdapter(Context context, String[] values) { 
    super(context, R.layout.item_list, values); 
    this.context = context; 
    this.values = values; 
} 

@Override 
    public View getView(int position, View convertView, ViewGroup parent) { 
    LayoutInflater inflater = (LayoutInflater) context 
     .getSystemService(Context.LAYOUT_INFLATER_SERVICE); 
    View rowView = inflater.inflate(R.layout.item_list, parent, false); 
    CheckBox textView = (CheckBox) rowView.findViewById(R.id.checkBox1); 
    textView.setText(values[position]); 

    return rowView; 
    } 

public static SparseBooleanArray getCheckedItemPositions() { 
    // TODO Auto-generated method stub 
    return null; 
} 

public static void remove(Object pos) { 
    // TODO Auto-generated method stub 

} 

public void changeData(String[] items) { 
    // TODO Auto-generated method stub 

} 

public static void setAdapter(MyItemAdapter mAdapter) { 
    // TODO Auto-generated method stub 

} 

这是我的第一个活动代码：

  final CheckBox check = (CheckBox) findViewById(R.id.checkBox1); 
      check.setOnClickListener(new View.OnClickListener() { 

     @Override 
     public void onClick(View v) { 
      Intent intent = new Intent(MainActivity.this, FinishedItems.class); 
      intent.putExtra("check", items); 
      Bundle extras = new Bundle(); 
      extras.putString("status", "Data Recived"); 
      intent.putExtras(extras); 
      startActivity(intent); 

     } 
    }); 
    } 

这是我的第二个活动代码：

Intent intent = getIntent(); 
    String check = intent.getStringExtra("check"); 
    ((CheckBox)findViewById(R.id.checkBox1)).setText(check); 
    Bundle bundle = intent.getExtras(); 
    String status = bundle.getString("status"); 
    Toast toast = Toast.makeText(this, status, Toast.LENGTH_LONG); 
    toast.show(); 

而且Finaly这是我的日志猫：

02-18 10:33:24.779: D/AndroidRuntime(1575): Shutting down VM 
02-18 10:33:24.779: W/dalvikvm(1575): threadid=1: thread exiting with uncaught exception  (group=0x40015560) 
02-18 10:33:24.789: E/AndroidRuntime(1575): FATAL EXCEPTION: main 
02-18 10:33:24.789: E/AndroidRuntime(1575): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.Stanton.quicktodolist/com.Stanton.quicktodolist.MainActivity}: java.lang.NullPointerException 
02-18 10:33:24.789: E/AndroidRuntime(1575): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1647) 
02-18 10:33:24.789: E/AndroidRuntime(1575): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1663) 
02-18 10:33:24.789: E/AndroidRuntime(1575): at android.app.ActivityThread.access$1500(ActivityThread.java:117) 
02-18 10:33:24.789: E/AndroidRuntime(1575): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:931) 
02-18 10:33:24.789: E/AndroidRuntime(1575): at android.os.Handler.dispatchMessage(Handler.java:99) 
02-18 10:33:24.789: E/AndroidRuntime(1575): at android.os.Looper.loop(Looper.java:130) 
02-18 10:33:24.789: E/AndroidRuntime(1575): at android.app.ActivityThread.main(ActivityThread.java:3683) 
02-18 10:33:24.789: E/AndroidRuntime(1575): at java.lang.reflect.Method.invokeNative(Native Method) 
02-18 10:33:24.789: E/AndroidRuntime(1575): at java.lang.reflect.Method.invoke(Method.java:507) 
02-18 10:33:24.789: E/AndroidRuntime(1575): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:839) 
02-18 10:33:24.789: E/AndroidRuntime(1575): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:597) 
02-18 10:33:24.789: E/AndroidRuntime(1575): at dalvik.system.NativeStart.main(Native Method) 
02-18 10:33:24.789: E/AndroidRuntime(1575): Caused by: java.lang.NullPointerException 
02-18 10:33:24.789: E/AndroidRuntime(1575): at com.Stanton.quicktodolist.MainActivity.onCreate(MainActivity.java:70) 
02-18 10:33:24.789: E/AndroidRuntime(1575): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047) 
02-18 10:33:24.789: E/AndroidRuntime(1575): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1611) 
02-18 10:33:24.789: E/AndroidRuntime(1575): ... 11 more 

请帮帮我

Answer 1

此行的堆栈跟踪

02-18 10:33:24.789: E/AndroidRuntime(1575): at com.Stanton.quicktodolist.MainActivity.onCreate(MainActivity.java:70) 

您指向错误的。 MainActivity中的第70行会产生空指针。学习和理解堆栈跟踪通常很有帮助。如果你自己弄不明白，请向我们展示MainActivity的onCreate方法。

Answer 2

我相信你通过捆绑额外更换意图额外只是试试这个代码，让我知道pelase

final CheckBox check = (CheckBox) findViewById(R.id.checkBox1); 
      check.setOnClickListener(new View.OnClickListener() { 

     @Override 
     public void onClick(View v) { 
      Intent intent = new Intent(MainActivity.this, FinishedItems.class); 
      intent.putExtra("check", items); 
      //Bundle extras = new Bundle(); 
      // extras.putString("status", "Data Recived"); 
      intent.putExtras("status", "Data Recived"); 
      startActivity(intent); 

     } 
    }); 

    } 

且INT第二活动

Intent intent = getIntent(); 
    String check = intent.getStringExtra("check"); 
    ((CheckBox)findViewById(R.id.checkBox1)).setText(check); 
    // Bundle bundle = intent.getExtras(); 
    String status = intent.getStringExtra("status"); 
    Toast toast = Toast.makeText(this, status, Toast.LENGTH_LONG); 
    toast.show();