ProxyActivity.java

package com.shizhefei.test.controllers;

import android.content.Context;
import android.content.Intent;
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentActivity;
import android.support.v4.app.FragmentManager;
import android.text.TextUtils;
import android.view.MenuItem;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.TextView;

import com.shizhefei.view.mvc.demo.R;

public class ProxyActivity extends FragmentActivity {

    /**
     * Fragment 的类名，用于反射创建fragment
     */
    public static final String INTENT_STRING_FRAGMENT_NAME = "intent_string_fragment_name";
    public static final String INTENT_STRING_FRAGMENT_TITLE = "intent_string_fragment_title";
    private View backView;

    @Override
    protected void onCreate(android.os.Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_proxy);
        View headLayout = findViewById(R.id.proxy_head_layout);
        TextView titleTextView = (TextView) findViewById(R.id.proxy_title_textView);
        backView = findViewById(R.id.proxy_back_view);
        String title = getIntent().getStringExtra(INTENT_STRING_FRAGMENT_TITLE);
        if (TextUtils.isEmpty(title)) {
            headLayout.setVisibility(View.GONE);
        } else {
            headLayout.setVisibility(View.VISIBLE);
            titleTextView.setText(title);
        }
        try {
            @SuppressWarnings("unchecked")
            Class<Fragment> fragmentClass = (Class<Fragment>) Class
                    .forName(getIntent().getStringExtra(
                            INTENT_STRING_FRAGMENT_NAME));

            FragmentManager fragmentManager = getSupportFragmentManager();
            Fragment fragment = fragmentManager.findFragmentById(R.id.proxy_fragment);
            if (fragment == null || !fragment.getClass().equals(fragmentClass)) {
                fragment = fragmentClass.newInstance();
                fragment.setArguments(new Bundle(getIntent().getExtras()));
                fragmentManager.beginTransaction().replace(R.id.proxy_fragment, fragment).commitAllowingStateLoss();
            }
        } catch (Exception e) {
            e.printStackTrace();
        }
        backView.setOnClickListener(onClickListener);
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        int id = item.getItemId();
        switch (id) {
            case android.R.id.home:
                finish();
                return true;
        }
        return false;
    }

    private OnClickListener onClickListener = new OnClickListener() {

        @Override
        public void onClick(View v) {
            if (v == backView) {
                finish();
            }
        }
    };

    public static void startActivity(Context context,
                                     Class<? extends Fragment> fragmentClass, Bundle bundle) {
        startActivity(context, fragmentClass, null, bundle);
    }

    public static void startActivity(Context context,
                                     Class<? extends Fragment> fragmentClass, String title) {
        startActivity(context, fragmentClass, title, null);
    }

    public static void startActivity(Context context,
                                     Class<? extends Fragment> fragmentClass) {
        startActivity(context, fragmentClass, null, null);
    }

    public static void startActivity(Context context,
                                     Class<? extends Fragment> fragmentClass, String title, Bundle bundle) {
        Intent intent = new Intent(context, ProxyActivity.class);
        intent.putExtra(ProxyActivity.INTENT_STRING_FRAGMENT_NAME,
                fragmentClass.getName());
        if (title != null) {
            intent.putExtra(ProxyActivity.INTENT_STRING_FRAGMENT_TITLE, title);
        }
        if (bundle != null) {
            intent.putExtras(bundle);
        }
        intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
        context.startActivity(intent);
    }

}