Android后退按钮的事件处理

凹凸曼一枚

于 2014-09-30 14:34:52 发布

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分类专栏： Android 文章标签： android 移动开发后退按钮事件处理

本文链接：https://blog.youkuaiyun.com/monkeyzsf/article/details/39695771

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Android后退按钮的事件处理

MainActivity.java

public class MainActivity extends Activity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
    }

    private long lastClickTime = 0;

    @Override
    public void onBackPressed() {
        if(lastClickTime <= 0) {
            Toast.makeText(MainActivity.this, "press again to quit", 2000).show();
            lastClickTime = System.currentTimeMillis();
        } else {
            long currentClickTime = System.currentTimeMillis();
            if(currentClickTime - lastClickTime < 1000) {
                finish();
            } else {
                Toast.makeText(MainActivity.this, "press again to quit", 2000).show();
                lastClickTime = currentClickTime;
            }
        }
    }

}