package com.jsd.demo;import android.app.Activity;import android.content.Context;import android.graphics.Color;import android.os.Bundle;import android.os.Handler;import android.os.Message;import android.view.View;import android.view.View.OnClickListener;import android.widget.Button;import android.widget.TextView;/** * * @author jiangshide * */public class JsdMainDialog extends Activity {  private Context mContext;  private Button mSub; private TextView mResultValue;  public static Handler handler = new Handler();     @Override    public void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.main);        getViewById();    }       public void getViewById(){     mContext = this;     mSub = (Button) this.findViewById(R.id.sub);     mResultValue = (TextView) this.findViewById(R.id.resultValue);     mResultValue.setText("没有通过Handler处理");     mSub.setOnClickListener(listener);    }       private OnClickListener listener = new OnClickListener() {  @Override  public void onClick(View v) {   switch (v.getId()) {   case R.id.sub:    final String flag = "rqbackvalue";    DialogCustomer  dc = new DialogCustomer(mContext,flag);    dc.show();    handler = new Handler(){     public void handleMessage(Message msg) {      String resultFlag = msg.getData().getString("flags");      if(resultFlag.equalsIgnoreCase(flag)){       mResultValue.setText("这是通过Handler处理过后来显示数据的");       mResultValue.setTextColor(Color.CYAN);       mResultValue.setTextSize(30);      }     };    };    break;   default:    break;   }  } };} 

package com.jsd.demo;import android.app.Dialog;import android.content.Context;import android.os.Bundle;import android.os.Message;import android.view.View;import android.widget.Button;/** * * @author jiangshide * */public class DialogCustomer extends Dialog { private Context mContext;  private Button ok; String flag;  public DialogCustomer(Context c,String flag) {  super(c);  this.mContext = c;  this.flag = flag; } @Override protected void onCreate(Bundle savedInstanceState) {  super.onCreate(savedInstanceState);  setContentView(R.layout.dialog);  getViewById(); }  public void getViewById(){  ok = (Button) this.findViewById(R.id.dialog_ok);  ok.setOnClickListener(listener); }  private android.view.View.OnClickListener listener = new android.view.View.OnClickListener() {  @Override  public void onClick(View v) {   switch (v.getId()) {   case R.id.dialog_ok:    Message msg = new Message();//获取设置一个信息保存点    msg.what=1;    msg.getData().putString("flags", flag);    JsdMainDialog.handler.sendMessage(msg);//把数据放进LOOPER队列里    dismiss();    break;   }  } };}

<?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="match_parent"  android:orientation="vertical"  >  <TextView   android:layout_width="wrap_content"   android:layout_height="wrap_content"   android:text="当返回时把参数传递过去并执行判断后的操作"   />  <Button   android:id="@+id/dialog_ok"   android:layout_width="wrap_content"   android:layout_height="wrap_content"    android:text="请点击"   /></LinearLayout>