前言

原文地址:http://blog.csdn.net/caption_deng/article/details/52870222
Intent在我們開發(fā)中一直在使用，但是我們在沒有寫在Base里面的時候每一次跳轉(zhuǎn)都會寫很多Intent mintent=new Intent();startActivity(mintent);這樣的方法，甚至有時候一個Activity（fragment）中會出現(xiàn)很多并且會傳值等，但是這樣會煩、代碼重復(fù)，我結(jié)合網(wǎng)絡(luò)上一些有經(jīng)驗的前輩寫了一個intent工具

package com.util;

import android.app.Activity;
import android.content.Context;
import android.content.Intent;
import android.os.Parcelable;

/**
 * Intent跳轉(zhuǎn)封裝
 * Created by Administrator on 2018/1/16 0016.
 */

public class IntentUtil {
    public static final String OPEN_ACTIVITY_KEY = "open_activity";//intent跳轉(zhuǎn)傳遞傳輸key
    private static IntentUtil manager;
    private static Intent intent;

    private IntentUtil() {

    }

    public static IntentUtil get() {
        if (manager == null) {
            synchronized (IntentUtil.class) {
                if (manager == null) {
                    manager = new IntentUtil();
                }
            }
        }
        intent = new Intent();
        return manager;
    }

    /**
     * 獲取上一個界面?zhèn)鬟f過來的參數(shù)
     *
     * @param activity this
     * @param <T>      泛型
     * @return
     */
    public <T> T getParcelableExtra(Activity activity) {
        Parcelable parcelable = activity.getIntent().getParcelableExtra(OPEN_ACTIVITY_KEY);
        activity = null;
        return (T) parcelable;
    }

    /**
     * 啟動一個Activity
     *
     * @param _this
     * @param _class
     */
    public void goActivity(Context _this, Class<? extends Activity> _class) {
        intent.setClass(_this, _class);
        _this.startActivity(intent);
        _this = null;
    }

    /**
     * 啟動activity后kill前一個
     *
     * @param _this
     * @param _class
     */
    public void goActivityKill(Context _this, Class<? extends Activity> _class) {
        intent.setClass(_this, _class);
        _this.startActivity(intent);
        ((Activity) _this).finish();
        _this = null;
    }

    /**
     * 回調(diào)跳轉(zhuǎn)
     *
     * @param _this
     * @param _class
     * @param requestCode
     */
    public void goActivityResult(Activity _this, Class<? extends Activity> _class, int requestCode) {
        intent.setClass(_this, _class);
        _this.startActivityForResult(intent, requestCode);
        _this = null;
    }

    /**
     * 回調(diào)跳轉(zhuǎn)并finish當(dāng)前頁面
     *
     * @param _this
     * @param _class
     * @param requestCode
     */
    public void goActivityResultKill(Activity _this, Class<? extends Activity> _class, int requestCode) {
        intent.setClass(_this, _class);
        _this.startActivityForResult(intent, requestCode);
        ((Activity) _this).finish();
        _this = null;
    }

    /**
     * 傳遞一個序列化實體類
     *
     * @param _this
     * @param _class
     * @param parcelable
     */
    public void goActivity(Context _this, Class<? extends Activity> _class, Parcelable parcelable) {
        intent.setClass(_this, _class);
        putParcelable(parcelable);
        _this.startActivity(intent);
        _this = null;
    }

    /**
     * 啟動一個Activity
     *
     * @param _this
     * @param _class
     * @param flags
     * @param parcelable 傳遞的實體類
     */
    public void goActivity(Context _this, Class<? extends Activity> _class, int flags, Parcelable parcelable) {
        intent.setClass(_this, _class);
        setFlags(flags);
        putParcelable(parcelable);
        _this.startActivity(intent);
        _this = null;
    }

    public void goActivityKill(Context _this, Class<? extends Activity> _class, Parcelable parcelable) {
        intent.setClass(_this, _class);
        putParcelable(parcelable);
        _this.startActivity(intent);
        ((Activity) _this).finish();
        _this = null;
    }

    public void goActivityKill(Context _this, Class<? extends Activity> _class, int flags, Parcelable parcelable) {
        intent.setClass(_this, _class);
        setFlags(flags);
        putParcelable(parcelable);
        _this.startActivity(intent);
        ((Activity) _this).finish();
        _this = null;
    }

    public void goActivityResult(Activity _this, Class<? extends Activity> _class, Parcelable parcelable, int requestCode) {
        intent.setClass(_this, _class);
        putParcelable(parcelable);
        _this.startActivityForResult(intent, requestCode);
        _this = null;
    }

    public void goActivityResult(Activity _this, Class<? extends Activity> _class, int flags, Parcelable parcelable, int requestCode) {
        intent.setClass(_this, _class);
        putParcelable(parcelable);
        setFlags(flags);
        _this.startActivityForResult(intent, requestCode);
        _this = null;
    }

    public void goActivityResultKill(Activity _this, Class<? extends Activity> _class, Parcelable parcelable, int requestCode) {
        intent.setClass(_this, _class);
        putParcelable(parcelable);
        _this.startActivityForResult(intent, requestCode);
        _this.finish();
        _this = null;
    }

    public void goActivityResultKill(Activity _this, Class<? extends Activity> _class, int flags, Parcelable parcelable, int requestCode) {
        intent.setClass(_this, _class);
        putParcelable(parcelable);
        setFlags(flags);
        _this.startActivityForResult(intent, requestCode);
        _this.finish();
        _this = null;
    }

    private void setFlags(int flags) {
        if (flags < 0) return;
        intent.setFlags(flags);
    }

    private void putParcelable(Parcelable parcelable) {
        if (parcelable == null) return;
        intent.putExtra(OPEN_ACTIVITY_KEY, parcelable);
    }
}

//使用方法
 IntentUtil.get().goActivity(this, MainActivity.class);