基于互联网连接的android更改视图

时间:2016-04-07 16:31:46

标签: android

我知道如何检查互联网连接,在许多活动和片段中,您可以将布局更改为静态视图,表明没有互联网连接。
我想让我的代码更有活力 问题是:如何根据互联网连接更改contentView? 我可以考虑检查每个Activity上的互联网是否可用,如果不是,只需更改视图并覆盖onClickListener,但我不想重复自己。

1 个答案:

答案 0 :(得分:0)

编写类似这样的代码,

import android.os.Bundle;
import android.os.Handler;
import android.support.v4.app.FragmentActivity;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.FrameLayout;
import android.widget.LinearLayout;

/**
 * @author Krish
 */
public abstract class BaseActivity extends FragmentActivity {

    protected abstract int getLayoutId();

    private LinearLayout connectivtyStateView;
    private ViewGroup content;

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        FrameLayout conainer = new FrameLayout(this);
        conainer.setLayoutParams(new ViewGroup.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT,
                ViewGroup.LayoutParams.MATCH_PARENT));
        this.connectivtyStateView = new LinearLayout(this);
        this.connectivtyStateView.setBackgroundResource(R.color.abc);
        this.connectivtyStateView.setLayoutParams(new ViewGroup.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT,
                ViewGroup.LayoutParams.MATCH_PARENT));
        conainer.addView(connectivtyStateView);
        this.content = (ViewGroup) LayoutInflater.from(this).inflate(getLayoutId(), conainer, true);
        setContentView(conainer);
    }

    @Override
    protected void onResume() {
        super.onResume();
        //registerReceiver()
    }


    @Override
    protected void onPause() {
        super.onPause();
        // unregisterReceiver();
    }


    /** Callback for connection change */
    private void handleConnectivityChange(boolean isConnected) {
        if (isConnected) {
            connectivtyStateView.setVisibility(View.GONE);
            content.setVisibility(View.VISIBLE);
        } else {
            connectivtyStateView.setVisibility(View.VISIBLE);
            content.setVisibility(View.GONE);
        }
    }

}

为您的Activities扩展此类,并实现抽象方法以返回内容布局的布局资源ID。