调用从广播接收器的setContentView（） [英] Calling SetContentView() from broadcast receiver

问题描述

在我的应用程序有一二类InternetActivity只延伸活动，并设置内容查看主。和MyClass的延伸广播接收机。

In my application there are two class one is InternetActivity which only extends Activity and sets contentview to main. and MyClass that extends broadcast receiver.

我有2个TextView的和main.xml中的文件2 ImageView的WIFI和GPRS的。 当改变连通性正在发生，brodcast接收器获取调用，并根据是什么启用，什么不是我想要设置的TextView和ImageView的知名度。但它是仅示出两个图像而不是更改。 这里是MyClass.java文件。我该怎么办呢？？

I have 2 TextView and 2 ImageView of WIFI and GPRS in main.xml file. When changes in connectivities are happening,brodcast receiver is getting called and according to what is enabled and what is not i want to set visibility of TextView and ImageView. But it is only showing both the images and not the changes. here is MyClass.java file. how can i do it??

public class MyClass extends BroadcastReceiver {

private static ImageView wifi_image, gprs_image;
private static TextView wifi_text, gprs_text;

@Override
public void onReceive(Context context, Intent intent) {

    Log.i("IntrntActivity", "Broadcast message receivved");

    LinearLayout layout = new LinearLayout(context);
    LinearLayout.LayoutParams params = new LayoutParams(
            LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT);

    View view = View.inflate(context, R.layout.main, layout);

    wifi_image = (ImageView) view.findViewById(R.id.wifi_image);
    gprs_image = (ImageView) view.findViewById(R.id.gprs_image);

    wifi_text = (TextView) view.findViewById(R.id.wifi_text);
    gprs_text = (TextView) view.findViewById(R.id.gprs_text);

    wifi_image.setVisibility(View.GONE);
    wifi_text.setVisibility(View.GONE);
    gprs_image.setVisibility(View.GONE);
    gprs_text.setVisibility(View.GONE);

    ConnectivityManager cm = (ConnectivityManager) context
            .getSystemService(context.CONNECTIVITY_SERVICE);
    NetworkInfo WIFI = cm.getNetworkInfo(ConnectivityManager.TYPE_WIFI);
    NetworkInfo Mobile = cm.getNetworkInfo(ConnectivityManager.TYPE_MOBILE);

    if (!WIFI.isConnected() && WIFI.isAvailable()) {
        Toast.makeText(context, "WIFI is available but not connected",
                Toast.LENGTH_LONG).show();
    }

    if (cm.getNetworkInfo(ConnectivityManager.TYPE_WIFI).isAvailable()) {
        wifi_image.setVisibility(View.VISIBLE);
        wifi_text.setVisibility(View.VISIBLE);

    }

    if (Mobile.isConnected()) {
        gprs_image.setVisibility(View.VISIBLE);
        gprs_text.setVisibility(View.VISIBLE);
        Log.i("IntrntActivity", "Mobile isConnected");

        // Toast.makeText(context,"GPRS is available",
        // Toast.LENGTH_LONG).show();
    }

    if (!Mobile.isConnected()) {
        gprs_image.setVisibility(View.GONE);
        gprs_text.setVisibility(View.GONE);
        Log.i("IntrntActivity", "Mobile is Not Connected");
        // Toast.makeText(context,"GPRS is available",
        // Toast.LENGTH_LONG).show();
    }


}

}

PS：这是正确朝着 Mobile.isConnected（）和 Mobile.isConnected（）和展示！这在日志文件中，但它的知名度不changing.Am我没有正确设置视图？并有可能从该广播接收器调用的setContentView（视图）？

P.S : It is correctly going in Mobile.isConnected() and !Mobile.isConnected() and showing it in Log file but its Visibility is not changing.Am i not setting the view correctly? and is it possible to call setContentView(view) from this broadcast receiver?

推荐答案

您需要把你的reciever到InternetActivity类，注册它，并使用已定义的局部变量。你不必创建单独的公共BroadcastReceiver的实施，只是做了局部的。

You need to put your reciever into InternetActivity class, register it there and use already defined local variables. You need not to create separate public BroadcastReceiver implementation, just do a local one.

这样的：

import android.content.BroadcastReceiver;
import android.content.Context;

public class InternetActivity extends Activity {

    private ImageView image;
    private TextView text;

    private BroadcastReceiver reciever = new BroadcastReceiver(){
        @Override
        public void onReceive(Context context, Intent intent) {
           // do all the checking
           // interact with image and text
        }    
    };
    @Override
    public void onCreate(Bundle state) {
        setContentView(R.layout.....);
        // fill in image and text variables
    }
    @Override
    public void onStart() {
        registerReceiver(receiver, /* your intent filter here */);
    }
    @Override
    public void onStop() {
        unregisterReceiver(receiver);
    }
}

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