子线程无法更新UI
new Thread(new Runnable() {
@Override
public void run() {
Toast.makeText(MainActivity.this, "haha", Toast.LENGTH_SHORT).show();
}
}).start();
runOnUiThread
new Thread(new Runnable() {
@Override
public void run() {
runOnUiThread(new Runnable() {
@Override
public void run() {
Toast.makeText(MainActivity.this, "haha", Toast.LENGTH_SHORT).show();
}
});
}
}).start();
handler
- 创建一个handler 对象
-
使用handler对象 post一个Runable对象到主线程执行
Handler mHandler = new Handler(); @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); new Thread(new Runnable() { @Override public void run() { mHandler.post(new Runnable() { @Override public void run() { Toast.makeText(MainActivity.this, "haah", Toast.LENGTH_SHORT).show(); } }); } }).start(); }
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
new Handler().postDelayed(new Runnable() {
@Override
public void run() {
Intent intent = new Intent(MainActivity.this,SecondActivity.class);
startActivity(intent);
}
},1000);
点击查看更多内容
为 TA 点赞
评论
共同学习,写下你的评论
评论加载中...
作者其他优质文章
正在加载中
感谢您的支持,我会继续努力的~
扫码打赏,你说多少就多少
赞赏金额会直接到老师账户
支付方式
打开微信扫一扫,即可进行扫码打赏哦