Question

我想知道是否有任何方法可以将字符串从活动传递到扩展phoneStatelistener的类。

在发送结束时，我使用了

    Intent pass = new Intent(ListActivity.this,CallHelper.class);
    pass.putExtra("name", name);

并在接收端..

 public class CallHelper {

     private class CallStateListener extends PhoneStateListener {
         int flag;

         @Override
         public void onCallStateChanged(int state, String incomingNumber) {
             String name = getintent().getStringExtra();
         }

但它在getintent（）部分显示错误，有没有其他方法？

Answer 1

您无法在getIntent()的课程中致电extends PhoneStateListener。如果CallHelper是一项活动，我建议您覆盖CallStateListener的默认构造函数。

public class CallHelper extends Activity{

    String name;
    @Override
    public void onCreate(Bundle savedInstanceState){
        super.onCreate(savedInstanceState);
        setContentView(R.layout.call_helper_layout);
        Bundle extras = getIntent().getExtras();
        if(extras != null){
            name = extras.getString("name");
        }
        CallStateListener c = new CallStateListener(name);
    }

    private class CallStateListener extends PhoneStateListener {
        int flag;
        String name;

        public CallStateListener(String name){
            this.name = name;
        }

        @Override
        public void onCallStateChanged(int state, String incomingNumber) {
                 //do stuff with name
        }           
    }
}

Answer 2

我总是这样做：我创建类，然后使用setter来设置值。发送意图在我看来有点多......

活动：

class SomeActivity extends Activity {

    public void onCreate(Bundle savedInstanceState){
        CallStateListener listener = new CallStateListener();
        listener.setFlag(myValue);
    }

}

听众：

class CallStateListener extends PhoneStateListener {
     int flag;

     @Override
     public void onCallStateChanged(int state, String incomingNumber) {
         String name = getintent().getStringExtra();
     }

     public void setFlag(int flag) {
        this.flag = flag;
     }

     ...

}

希望能帮到你！

将String传递给扩展PhoneStateListener的类

2 个答案: