android开发设置dialog的高宽

dlg.show();
                WindowManager.LayoutParams params = dlg.getWindow().getAttributes(); 
                params.width = this.getWindowManager().getDefaultDisplay().getWidth(); 
//                params.height = 200 ; 
                dlg.getWindow().setAttributes(params);

import com.carspeak.client.R;

import android.app.Dialog;
import android.content.Context;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;

/**
 * 自定义弹出输入框
 * Created by Administrator on 2014/12/11.
 */
public class CusInputDialog extends Dialog {
    private EditText editText;
    private Button positiveButton, negativeButton;
    private TextView title;
    public CusInputDialog(Context context) {
        super(context, R.style.CusInputAlertDialog);
        setCustomDialog();
    }
    private void setCustomDialog() {
        View mView = LayoutInflater.from(getContext()).inflate(R.layout.view_dialog_input, null);
        title = (TextView) mView.findViewById(R.id.title);
        editText = (EditText) mView.findViewById(R.id.et_value);
        positiveButton = (Button) mView.findViewById(R.id.positiveButton);
        negativeButton = (Button) mView.findViewById(R.id.negativeButton);
        super.setContentView(mView);
    }
    public View getEditText(){
        return editText;
    }
    @Override
    public void setContentView(int layoutResID) {
    }
    @Override
    public void setContentView(View view, ViewGroup.LayoutParams params) {
    }
    @Override
    public void setContentView(View view) {
    }
    /**
     * * 确定键监听器
     * * @param listener
     * */
    public void setOnPositiveListener(View.OnClickListener listener){
        positiveButton.setOnClickListener(listener);
    }
    /**
     * * 取消键监听器
     * * @param listener
     * */
    public void setOnNegativeListener(View.OnClickListener listener){
        negativeButton.setOnClickListener(listener);
    }
    public void setTitle(String t)
    {
        title.setText(t);
    }
    public void setpositiveButtonTxt(String t)
    {
        positiveButton.setText(t);
    }
    public void setnegativeButtonTxt(String t)
    {
        negativeButton.setText(t);
    }
}

    <style name="CusInputAlertDialog" parent="@android:style/Theme.Dialog">  <!-- 带输入框的自定义弹出框样式 -->
        <item name="android:windowNoTitle">true</item>
        <item name="android:background">@android:color/transparent</item>
        <item name="android:windowBackground">@android:color/transparent</item>
        <item name="android:windowSoftInputMode">stateUnspecified|adjustPan</item>
    </style>

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:layout_gravity="center"
    android:background="@drawable/bg_bombbox"
    android:orientation="vertical"
    android:paddingLeft="10dp"
    android:paddingRight="10dp"
    android:paddingBottom="10dp">

    <TextView
        android:id="@+id/title"
        android:layout_width="fill_parent"
        android:layout_height="40.0dip"
        android:gravity="center"
        android:text="输入"
        android:singleLine="true"
        android:ellipsize="end"
        android:textColor="#fff"
        android:textSize="15sp" />
    <EditText
        android:id="@+id/et_value"
        android:layout_width="fill_parent"
        android:layout_height="60dp"
        android:layout_marginTop="15dp"
        android:gravity="left|center"
        android:singleLine="true"
        android:maxLength="200"
        android:padding="1dp"
        android:textColor="#333"/>
    <!-- </LinearLayout> -->

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="35.0dip"
        android:layout_gravity="bottom"
        android:layout_marginTop="20dp"
        android:gravity="center"
        android:orientation="horizontal">

        <Button
            android:id="@+id/negativeButton"
            android:layout_width="0dp"
            android:layout_weight="1"
            android:layout_height="wrap_content"
            android:textColor="#fff"
            android:background="@drawable/selector_bt_gray2333"
            android:gravity="center"
            android:paddingLeft="8dp"
            android:paddingRight="8dp"
            android:paddingTop="5dp"
            android:paddingBottom="5dp"
            android:text="取消"/>

        <Button
            android:id="@+id/positiveButton"
            android:layout_width="0dp"
            android:layout_weight="1"
            android:layout_height="wrap_content"
            android:layout_marginLeft="20.0dip"
            android:textColor="#fff"
            android:background="@drawable/selector_bt_blue2deeper"
            android:gravity="center"
            android:paddingLeft="8dp"
            android:paddingRight="8dp"
            android:paddingTop="5dp"
            android:paddingBottom="5dp"
            android:text="确定"/>
    </LinearLayout>

</LinearLayout>

final CusInputDialog dlg = new CusInputDialog(this);
                dlg.setTitle("请输入对应的语音命令");
                dlg.setOnNegativeListener(new OnClickListener() {
                    
                    @Override
                    public void onClick(View arg0) {
                        dlg.dismiss();
                    }
                });
                dlg.setOnPositiveListener(new OnClickListener() {
                    
                    @Override
                    public void onClick(View arg0) {
                        String command_txt = ((EditText)dlg.getEditText()).getText().toString();
                        Log.v("CharInputActivity", "!RegexUtils.IsVoiceCommand(command_txt)="+!RegexUtils.IsVoiceCommand(command_txt));
                        if(!StringUtil.isNullorEmpty(command_txt)&&RegexUtils.IsVoiceCommand(command_txt))
                        {
//                            VoiceCommandEntity voice = new VoiceCommandEntity();
//                            voice.command = command_txt;
//                            voice.preViewUri = saveProjectionImage2File();
//                            saveProjectionImage2DB(voice);
//                            dlg.dismiss();
                            tv_shadow_preview.setDrawingCacheEnabled(true);  
                            tv_shadow_preview.buildDrawingCache();  //启用DrawingCache并创建位图   
                            Bitmap screen = Bitmap.createBitmap(tv_shadow_preview.getDrawingCache()); //创建一个DrawingCache的拷贝，因为DrawingCache得到的位图在禁用后会被回收   
                            tv_shadow_preview.setDrawingCacheEnabled(false);  //禁用DrawingCahce否则会影响性能  
                            SaveVoiceCommandUtil sv = new SaveVoiceCommandUtil(CharInputActivity.this);
                            int rs = sv.saveVoiceCommand(command_txt, screen);
                            if(rs==1){Toast.makeText(CharInputActivity.this, "保存成功", Toast.LENGTH_SHORT).show();dlg.dismiss();}
                            else if(rs==0){Toast.makeText(CharInputActivity.this, "该命令已经存在", Toast.LENGTH_SHORT).show();}
                            else {Toast.makeText(CharInputActivity.this, "保存失败，错误码："+rs, Toast.LENGTH_SHORT).show();}
                        }
                        else
                        {
                            Toast.makeText(CharInputActivity.this, "命令词只能是中英文和数字", Toast.LENGTH_SHORT).show();
                        }
                        
                    }
                });
                dlg.show();
                WindowManager.LayoutParams params = dlg.getWindow().getAttributes(); 
                params.width = this.getWindowManager().getDefaultDisplay().getWidth()-DensityUtils.dp2px(this, 40); 
//                params.height = 200 ; 
                dlg.getWindow().setAttributes(params);