Fragment 循环替换利用

来源：互联网发布：奔驰c级coupe 知乎编辑：程序博客网时间：2024/05/17 22:40
public class MainActivity extends AppCompatActivity {    String img="http://img.my.csdn.net/uploads/201407/26/1406383265_8550.jpg";    String a = "http://api.expoon.com/AppNews/getNewsList/type/1/p/1";    private Handler handler = new Handler() {        private Bitmap bitmap;        private String infoText;        @Override        public void handleMessage(Message msg) {            super.handleMessage(msg);            int what = msg.what;            switch (what) {                case 1:                    infoText = (String) msg.obj;                    Log.d("TAG",infoText);                    break;                case 2:                    bitmap = (Bitmap) msg.obj;                    break;            }            if(infoText!=null&&bitmap!=null){                mainFrag.aa(infoText,bitmap);               transaction.add(R.id.fl,list.get(0)).commit();                rg.setOnCheckedChangeListener(new RadioGroup.OnCheckedChangeListener() {                    @Override                    public void onCheckedChanged(RadioGroup radioGroup, @IdRes int i) {                        switch (i){                            case R.id.rb1:                                mainFrag.aa(infoText,bitmap);                                manager.beginTransaction().replace(R.id.fl,list.get(0)).commit();                                break;                            case R.id.rb2:                                mainFrag.aa("正在加載",null);                              // mainFrag.ww("正在加載");                                manager.beginTransaction().replace(R.id.fl,list.get(1)).commit();                                break;                            case R.id.rb3:                               mainFrag.aa("正在加載",null);                               //mainFrag.ww("正在加載");                                manager.beginTransaction().replace(R.id.fl,list.get(2)).commit();                                break;                        }                    }                });            }        }    };    private FragmentManager manager;    private FragmentTransaction transaction;    private mainFrag frag;    private RadioGroup rg;    List<Fragment> list = new ArrayList<Fragment>();    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        rg = (RadioGroup) findViewById(R.id.rg);        indata();        frag = new mainFrag();        manager = getSupportFragmentManager();        transaction = manager.beginTransaction();        onclick();    }    private void indata() {        for (int i=0;i<3;i++){            mainFrag frag = new mainFrag();            list.add(frag);        }    }    public void onclick(){                new Thread() {                    @Override                    public void run() {                        super.run();                        String netJson = Util.getNetJson(a);                        //Log.e("wzq", "run: " + netJson);                        Gson gson = new Gson();                       // Log.d("TAG","infoText");                        News product = gson.fromJson(netJson, News.class);                       // List<News.DataBean> data = product.getData();                        String infoText = product.getInfo();                        Bitmap bitmap = Util.getBitmap(img);                        Message message = new Message();                        message.obj = infoText;                        message.what = 1;                        handler.sendMessage(message);                        Message message1 = new Message();                        message1.obj = bitmap;                        message1.what = 2;                        handler.sendMessage(message1);                    }                }.start();    }}
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