values 下面

dimens.xml

         
          
      
       16dp
          
      
       16dp
      
     

 

主布局

activity_switch.xml

两个fragment

fragment_message.xml

fragment_call.xml

主页面

SwitchActivity.java

package com.example.switchutils;import android.graphics.Color;import android.os.Bundle;import android.support.v4.app.Fragment;import android.support.v4.app.FragmentActivity;import android.support.v4.app.FragmentManager;import android.support.v4.app.FragmentTransaction;import android.view.View;import android.view.View.OnClickListener;import android.view.Window;import android.widget.Button;public class SwitchActivity extends FragmentActivity {    private Button btn_message,btn_call;        private CallFragment callFragment;    private MessageFragment messageFragment;        public static final int MESSAGE_FRAGMENT_TYPE = 1;    public static final int CALL_FRAGMENT_TYPE = 2;    public int currentFragmentType = -1;        @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        this.requestWindowFeature(Window.FEATURE_NO_TITLE);        setContentView(R.layout.activity_switch);                btn_message = (Button)findViewById(R.id.btn_message);        btn_call = (Button)findViewById(R.id.btn_call);        btn_message.setOnClickListener(onClicker);        btn_call.setOnClickListener(onClicker);                FragmentManager fragmentManager = getSupportFragmentManager();        if (savedInstanceState != null) {            int type = savedInstanceState.getInt("currentFragmentType");            messageFragment = (MessageFragment)fragmentManager.findFragmentByTag("message");            callFragment = (CallFragment)fragmentManager.findFragmentByTag("call");            if(type > 0)                loadFragment(type);        } else {            FragmentTransaction transaction = fragmentManager                    .beginTransaction();            Fragment mainFragment = fragmentManager.findFragmentByTag("message");            if (mainFragment != null) {                transaction.replace(R.id.fl_content, mainFragment);                transaction.commit();            } else {                loadFragment(MESSAGE_FRAGMENT_TYPE);            }        }            }        @Override    protected void onSaveInstanceState(Bundle outState) {        super.onSaveInstanceState(outState);        outState.putInt("lastFragmentTag", currentFragmentType);    }        private void switchFragment(int type) {        switch (type) {        case MESSAGE_FRAGMENT_TYPE:            loadFragment(MESSAGE_FRAGMENT_TYPE);            break;        case CALL_FRAGMENT_TYPE:            loadFragment(CALL_FRAGMENT_TYPE);            break;        }            }    private void loadFragment(int type) {        FragmentManager fragmentManager = getSupportFragmentManager();        FragmentTransaction transaction = fragmentManager.beginTransaction();        if (type == CALL_FRAGMENT_TYPE) {            if (callFragment == null) {                callFragment = new CallFragment();                transaction.add(R.id.fl_content, callFragment, "zhishi");            } else {                transaction.show(callFragment);            }            if (messageFragment != null) {                transaction.hide(messageFragment);            }            currentFragmentType = MESSAGE_FRAGMENT_TYPE;        } else {            if (messageFragment == null) {                messageFragment = new MessageFragment();                transaction.add(R.id.fl_content, messageFragment, "wenda");            } else {                transaction.show(messageFragment);            }            if (callFragment != null) {                transaction.hide(callFragment);            }            currentFragmentType = CALL_FRAGMENT_TYPE;        }        transaction.commitAllowingStateLoss();    }        private OnClickListener onClicker = new OnClickListener() {        @Override        public void onClick(View v) {            switch (v.getId()) {            case R.id.btn_message:                btn_message.setTextColor(Color.parseColor("#df3031"));                btn_call.setTextColor(Color.WHITE);                btn_message                        .setBackgroundResource(R.drawable.baike_btn_pink_left_f_96);                btn_call                        .setBackgroundResource(R.drawable.baike_btn_trans_right_f_96);                switchFragment(MESSAGE_FRAGMENT_TYPE);                                break;            case R.id.btn_call:                                btn_message.setTextColor(Color.WHITE);                btn_call.setTextColor(Color.parseColor("#df3031"));                btn_message                        .setBackgroundResource(R.drawable.baike_btn_trans_left_f_96);                btn_call                        .setBackgroundResource(R.drawable.baike_btn_pink_right_f_96);                switchFragment(CALL_FRAGMENT_TYPE);                                break;                        }        }    };}

两个fragment

MessageFragment.java

package com.example.switchutils;import android.os.Bundle;import android.support.v4.app.Fragment;import android.view.LayoutInflater;import android.view.View;import android.view.ViewGroup;public class MessageFragment extends Fragment {    @Override    public View onCreateView(LayoutInflater inflater,             ViewGroup container, Bundle savedInstanceState) {        return inflater.inflate(R.layout.fragment_message, null);    }}

CallFragment.java

package com.example.switchutils;import android.os.Bundle;import android.support.v4.app.Fragment;import android.view.LayoutInflater;import android.view.View;import android.view.ViewGroup;public class CallFragment extends Fragment {    @Override    public View onCreateView(LayoutInflater inflater,             ViewGroup container, Bundle savedInstanceState) {        return inflater.inflate(R.layout.fragment_call, null);    }}