Android更换头像问题，点击拍照或者从相册中选择没有返应。求助！

package com.activity;

import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import com.activity.R;

/**

• 头像获取方式选择弹出框
  */
  public class SetToTakePicActivity extends Activity {

  public static final String INTENT_KEY_BUTTON_TYPE = "ButtonType";
  public static final String BUTTON_TYPE_TAKE_PICTURES = "TAKE_PICTURES";
  public static final String BUTTON_TYPE_FROM_ALBUM = "FROM_ALBUM";
  public static final String BUTTON_TYPE_NUM = "NUM";
  private String num;

  @Override
  protected void onCreate(Bundle savedInstanceState) {
  super.onCreate(savedInstanceState);
  setContentView(R.layout.set_headpic);

  View btnTakePics = findViewById(R.id.btn_take_pictures);
  View btnFromAlbum = findViewById(R.id.btn_from_album);
  View btnCancel = findViewById(R.id.btn_cancel);
  
  btnTakePics.setOnClickListener(new mOnClickListener());
  btnFromAlbum.setOnClickListener(new mOnClickListener());
  btnCancel.setOnClickListener(new mOnClickListener());
  
  num = getIntent().getStringExtra("num");
  

  }

  class mOnClickListener implements View.OnClickListener {
  @Override
  public void onClick(View view) {

      switch (view.getId()) {
          case R.id.btn_take_pictures:    
              Intent intent = new Intent();
              intent.putExtra(INTENT_KEY_BUTTON_TYPE,
                      BUTTON_TYPE_TAKE_PICTURES);
              intent.putExtra(BUTTON_TYPE_NUM, num);
              setResult(Activity.RESULT_OK, intent);
              finish();
              break;
          case R.id.btn_from_album:
              intent = new Intent();
              intent.putExtra(INTENT_KEY_BUTTON_TYPE, BUTTON_TYPE_FROM_ALBUM);
              intent.putExtra(BUTTON_TYPE_NUM, num);
              setResult(Activity.RESULT_OK, intent);
              finish();
              break;
          case R.id.btn_cancel:
              finish();
              break;
          default:
              break;
      }
  }
  

  }

}

startactivityforresult 你用这个方法跳转啊，在onActivityResult方法中来处理返回的图片

你居然没startActivity？