点击列表视图，从Fragment打开新的Activity

Posted 2021-04-01

我想从listView上的Click方法中打开新的Activity。我为我的适配器实现单独的文件，并尝试从click listener方法打开新的Activity。但是当我尝试打开此活动时，它会显示我的错误。错误显示我在线上有一个错误，我称之为：

 ((Activity) getContext()).startActivityForResult(intentBlock, position);

致命异常：主进程：esticrm.pl.esticall，PID：28410 java.lang.IllegalStateException：片段CallsFragment {7b054bc}未附加到android.support.v4.app.Fragment.startActivityForResult（Fragment.java:1026）上的Activity在android.view.View.performClick的esticrm.pl.esticall.CallListAdapter $ 3.onClick（CallListAdapter.java:137）的android.support.v4.app.Fragment.startActivityForResult（Fragment.java:1017）（View.java:6199 ）在Android.os.Handler.dispatchMessage（Handler.java:95）的android.view.View $ PerformClick.run（View.java:23647）android.os.Handler.handleCallback（Handler.java:751）位于com.android.internal.os的java.lang.reflect.Method.invoke（Native Method）的android.app.ActivityThread.main（ActivityThread.java:6682）上的.os.Looper.loop（Looper.java:154） .ZygoteInit $ MethodAndArgsCaller.run（ZygoteInit.java:1520）at com.android.internal.os.ZygoteInit.main（ZygoteInit.java:1410）

我设置onClickListener的适配器文件

public class CallListAdapter extends ArrayAdapter<CallList> {

public CallListAdapter(Context context, ArrayList<CallList> calls) {
    super(context, 0, calls);
}
@Override
public View getView(final int position, View convertView, ViewGroup parent) {

        CallList callList = getItem(position);

    if (convertView == null) {
        convertView = LayoutInflater.from(getContext()).inflate(R.layout.call_list, parent, false);
    }
        block.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View view) {

            Intent intentBlock = new Intent(view.getContext(), BlockCallActivity.class);

            intentBlock.putExtra("number", num);
            intentBlock.putExtra("authToken", authToken);


            ((Activity) getContext()).startActivityForResult(intentBlock, position);
        }
    });
  }
}

答案

将活动作为参数发布并调用activity.startActivity（）

使用以下代码

public class CallListAdapter extends ArrayAdapter<CallList> {
    Activity activity;
    public CallListAdapter(Context context, ArrayList<CallList> calls,Activity activity) {
        super(context, 0, calls);
        this.activity = activity;
    }
    @Override
    public View getView(final int position, View convertView, ViewGroup parent) {

        CallList callList = getItem(position);

        if (convertView == null) {
            convertView = LayoutInflater.from(getContext()).inflate(R.layout.call_list, parent, false);
        }
        block.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {

                Intent intentBlock = new Intent(view.getContext(), BlockCallActivity.class);

                intentBlock.putExtra("number", num);
                intentBlock.putExtra("authToken", authToken);


                activity.startActivityForResult(intentBlock, position);
            }
        });
    }
}