无法解析方法startActivity() [英] Cannot resolve method startActivity()

问题描述

我是android开发的新手，更改活动时遇到了一些问题.我正在尝试从方法内部更改活动，但出现错误无法解析方法startActivity ，并且在参数结束处出现错误无法解析构造函数'Intent(...)'.我发现此处有一个问题，具有相同类型的问题，并尝试将其答复实施到我的程序中，但没有欢乐.

I'm new to the android development and having a bit of a problem changing activities. I am trying to change activities from within a method but I am getting the error cannot resolve method startActivity and on the parameter end the error Cannot resolve constructor 'Intent (...)'. I found a question here with the same sort of problem and tried to implement their replies into my program but no joy.

这是代码:

public void open301(View view) {
    startActivity(new Intent(CustomAdapter.this, ThreeZeroOne.class));
}

在查看代码上方链接的问题的答复之前，看起来是这样，但有相同的错误:

before looking at the replies from the question linked above the code looked like this with the same errors:

public void open301(View view) {
   Intent openThree = new Intent(this,ThreeZeroOne.class);
    startActivity(openThree);
}

完整代码:

import android.content.Context;
import android.view.LayoutInflater;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.ImageView;
import android.widget.TextView;
import android.widget.Toast;
import android.content.Intent;

public class CustomAdapter extends BaseAdapter {
  String[] result;
  Context context;
  int[] imageId;

  private static LayoutInflater inflater = null;

  public CustomAdapter(selectGame SelectGame, String[] prgmNameList, int[] prgmImages) {
    result = prgmNameList;
    context = SelectGame;
    this.imageId = prgmImages;
    inflater = (LayoutInflater) context.getSystemService(Context.
        LAYOUT_INFLATER_SERVICE);
  }

  @Override
  public int getCount() {
    return result.length;
  }

  @Override
  public Object getItem(int position) {
    return position;
  }

  @Override
  public long getItemId(int position) {
    return position;
  }

  public class Holder {
    TextView tv;
    ImageView img;
  }

  @Override
  public View getView(final int position, View convertView, ViewGroup parent) {
    Holder holder = new Holder();
    View rowView;
    rowView = inflater.inflate(R.layout.game_selection, null);
    holder.tv = (TextView) rowView.findViewById(R.id.txt);
    holder.img = (ImageView) rowView.findViewById(R.id.img);
    holder.tv.setText(result[position]);
    holder.img.setImageResource(imageId[position]);
    rowView.setOnClickListener(new OnClickListener() {
      @Override
      public void onClick(View v) {
        Toast.makeText(context, "Beginning game " + result[position], Toast.LENGTH_SHORT).show();

      }
    });
    return rowView;
  }

  public void open301(View view) {
    Intent openThree = new Intent(this,ThreeZeroOne.class);
    startActivity(openThree);
  }
}

推荐答案

您应使用适配器的上下文:

You should use the context of your adapter:

public void open301(View view) {
  Intent openThree = new Intent(context,ThreeZeroOne.class);
  context.startActivity(openThree);
}

这篇关于无法解析方法startActivity()的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！