android基础教程之android的listview与edittext冲突解决方法

<cn.test.systemSetting.MyLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/keyboardlayout"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:background="@drawable/main_bg"
    android:orientation="vertical" >
    <ListView
                android:id="@+id/lv_data"
                android:layout_width="fill_parent"
                android:layout_height="fill_parent"
                android:layout_weight="1"
                android:cacheColorHint="#00000000"
                android:transcriptMode="normal"
                >
     </ListView>
</cn.test.systemSetting.MyLayout>

package cn.test.systemSetting;

import com.********.R;

import android.content.Context;
import android.util.AttributeSet;
import android.view.KeyEvent;
import android.view.LayoutInflater;
import android.view.View;
import android.view.inputmethod.InputMethodManager;
import android.widget.EditText;
import android.widget.LinearLayout;
/**
 *
 * 针对设备管理键盘事件的处理
 * divid小硕
 *
 * **/

public class MyLayout extends LinearLayout {
    private Context context;
    public MyLayout(Context context) {
        super(context);
        // TODO Auto-generated constructor stub
        this.context=context;
        LayoutInflater.from(context).inflate(R.layout.device_manager, this);//此处所加载的layout就是上面的xml，即它的名字就是device_manager.xml
    }
    public MyLayout(Context context, AttributeSet attrs, int defStyle) {
        super(context, attrs, defStyle);
        // TODO Auto-generated constructor stub
    }

   
    public MyLayout(Context context, AttributeSet attrs) {
        super(context, attrs);
        // TODO Auto-generated constructor stub
    }
    @Override
    public boolean dispatchKeyEventPreIme(KeyEvent event) {
        // TODO Auto-generated method stub
        if(context!=null){
            InputMethodManager imm = (InputMethodManager) context.getSystemService(Context.INPUT_METHOD_SERVICE);
            if(imm.isActive() && event.getKeyCode() == KeyEvent.KEYCODE_BACK){
                View view = DeviceManagerActivity.lv_data.getFocusedChild();
                if(view!=null){
                    view.clearFocus();
                }

            }
        }

        return super.dispatchKeyEventPreIme(event);
    }
}

public class DeviceManagerActivity extends Activity implements OnClickListener{
    public static ListView lv_data;
    static DevMgrAdapter adapter;

    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        // 1.全屏
        requestWindowFeature(Window.FEATURE_NO_TITLE); // 无标题
        getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,
                WindowManager.LayoutParams.FLAG_FULLSCREEN);

        this.setContentView(new MyLayout(this));
        init();
    }
}