android 子线程handler 实现

public class FinalActivity extends AppCompatActivity {    private TextView tvFinal;    private static Handler h;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_final);        findViewById(R.id.btn_next).setOnClickListener(new View.OnClickListener() {            @Override            public void onClick(View v) {                LogUtils.w("click............");                h.sendEmptyMessage(1);            }        });        tvFinal = findViewById(R.id.final_tv);        new Thread(new Runnable() {            @SuppressLint("HandlerLeak")            @Override            public void run() {                Looper.prepare();                h = new Handler(Looper.myLooper()) {                    @Override                    public void handleMessage(Message msg) {                        super.handleMessage(msg);                        String text = "改变了" + new Random().nextInt(1000);                        LogUtils.w("text:" + text);                    }                };                Looper.loop();            }        }).start();    }    @Override    protected void onDestroy() {        super.onDestroy();        LogUtils.w("destroy....");        if (h != null) {            h.removeCallbacksAndMessages(null);        }    }}

代码是示例代码，但是简单明了，子线程更新 UI，就这样写就可以了。

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