这是错误提示：
错误: 对于add(int,ChatFragment), 找不到合适的方法
方法 FragmentTransaction.add(Fragment,String)不适用
(参数不匹配; int无法转换为Fragment)
方法 FragmentTransaction.add(int,Fragment)不适用
(参数不匹配; ChatFragment无法转换为Fragment)
代码图片
**
下面是代码**
package com.uitest.administrator.shoulderby.activity;
import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.support.v4.app.FragmentActivity;
import android.support.v4.app.FragmentManager;
import android.support.v4.app.FragmentTransaction;
import android.view.KeyEvent;
import android.view.View;
import android.widget.FrameLayout;
import android.widget.ImageView;
import android.widget.LinearLayout;
import android.widget.TextView;
import android.widget.Toast;
import com.uitest.administrator.shoulderby.R;
import com.uitest.administrator.shoulderby.fragment.HomeFragment;
import com.uitest.administrator.shoulderby.fragment.JobFragment;
import com.uitest.administrator.shoulderby.fragment.MeFragment;
import com.uitest.administrator.shoulderby.fragment.ChatFragment;
import butterknife.Bind;
import butterknife.ButterKnife;
import butterknife.OnClick;
/*
主界面
*/
public class MainActivity extends FragmentActivity {
@Bind(R.id.fl_main_content)
FrameLayout flMainContent;
@Bind(R.id.iv_main_home)
ImageView ivMainHome;
@Bind(R.id.tv_main_home)
TextView tvMainHome;
@Bind(R.id.ll_main_home)
LinearLayout llMainHome;
@Bind(R.id.iv_main_job)
ImageView ivMainJob;
@Bind(R.id.tv_main_job)
TextView tvMainJob;
@Bind(R.id.ll_main_job)
LinearLayout llMainJob;
@Bind(R.id.iv_main_me)
ImageView ivMainMe;
@Bind(R.id.tv_main_me)
TextView tvMainMe;
@Bind(R.id.ll_main_me)
LinearLayout llMainMe;
@Bind(R.id.iv_main_chat)
ImageView ivMainChat;
@Bind(R.id.tv_main_chat)
TextView tvMainChat;
@Bind(R.id.ll_main_chat)
LinearLayout llMainChat;
private FragmentManager fragmentManager;
private HomeFragment homeFragment;
private MeFragment meFragment;
private ChatFragment chatFragment;
private JobFragment jobFragment;
private FragmentTransaction transaction;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
ButterKnife.bind(this);
//初始化HOME界面，默认进入软件是HOME界面
fragmentManager=getSupportFragmentManager();
transaction = fragmentManager.beginTransaction();
homeFragment = new HomeFragment();
transaction.add(R.id.fl_main_content, homeFragment);
transaction.commit();
}
//设置点击监听事件
@OnClick({R.id.ll_main_home, R.id.ll_main_me,R.id.ll_main_chat, R.id.ll_main_job})
public void changeTab(View v) {
transaction = fragmentManager.beginTransaction();
//设置隐藏Fragment/图片/颜色
hideFragment();
switch (v.getId()) {
case R.id.ll_main_home:
if (homeFragment == null) {
homeFragment = new HomeFragment();
transaction.add(R.id.fl_main_content, homeFragment);
}
transaction.show(homeFragment);
ivMainHome.setImageResource(R.drawable.bottom02);
tvMainHome.setTextColor(getResources().getColor(R.color.home_back_selected));
break;
case R.id.ll_main_job:
if (jobFragment == null) { //当jobFragment不存在时，进行初始化
jobFragment = new JobFragment();
transaction.add(R.id.fl_main_content, jobFragment); //添加jobFragment
}
transaction.show(jobFragment); //显示jobFragment
ivMainJob.setImageResource(R.drawable.bottom08);
tvMainJob.setTextColor(getResources().getColor(R.color.home_back_selected));
break;
case R.id.ll_main_chat:
if (chatFragment == null) {
chatFragment = new ChatFragment();
transaction.add(R.id.fl_main_content, chatFragment);
}
transaction.show(chatFragment);
ivMainChat.setImageResource(R.drawable.bottom04);
tvMainChat.setTextColor(getResources().getColor(R.color.home_back_selected));
break;
case R.id.ll_main_me:
if (meFragment == null) {
meFragment = new MeFragment();
transaction.add(R.id.fl_main_content, meFragment);
}
transaction.show(meFragment);
ivMainMe.setImageResource(R.drawable.bottom06);
tvMainMe.setTextColor(getResources().getColor(R.color.home_back_selected));
break;
}
transaction.commit();
}
//设置隐藏Fragment/图片/颜色
private void hideFragment() {
if (homeFragment != null) {
ivMainHome.setImageResource(R.drawable.bottom01);
tvMainHome.setTextColor(getResources().getColor(R.color.home_back_unselected));
transaction.hide(homeFragment);
}
if (jobFragment != null) {
ivMainJob.setImageResource(R.drawable.bottom07);
tvMainJob.setTextColor(getResources().getColor(R.color.home_back_unselected));
transaction.hide(jobFragment);
}
if (chatFragment != null) {
ivMainChat.setImageResource(R.drawable.bottom03);
tvMainChat.setTextColor(getResources().getColor(R.color.home_back_unselected));
transaction.hide(chatFragment);
}
if (meFragment != null) {
ivMainMe.setImageResource(R.drawable.bottom05);
tvMainMe.setTextColor(getResources().getColor(R.color.home_back_unselected));
transaction.hide(meFragment);
}
}
private boolean flag = true; //flag 用于判断是否是第一次点击返回键
private static final int WHAT_RESET_BACK = 1;
private Handler handler = new Handler() {
public void handleMessage(Message msg) {
switch (msg.what) {
case WHAT_RESET_BACK:
flag = true;
break;
}
}
};
//重写onKeyDown，当点击两次返回键退出程序
@Override
public boolean onKeyDown(int keyCode, KeyEvent event) {
if (keyCode == KeyEvent.KEYCODE_BACK && flag) {
Toast.makeText(this, "再点击一次，退出当前应用", Toast.LENGTH_SHORT).show();
flag = false;
handler.sendEmptyMessageDelayed(WHAT_RESET_BACK, 2000); //设置2s的延迟，用于处理flag的值
return true;
}
return super.onKeyDown(keyCode, event);
}
//为了避免内存泄漏，应该在Destroy（）移除未被执行的消息
@Override
protected void onDestroy() {
super.onDestroy();
handler.removeCallbacksAndMessages(null);
}
}
