初次提交

第2章 游戏开发基础知识/Sample2_4_From/src/com/bn/pp4f/ContentConsumerActivity.java

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+package com.bn.pp4f;
+import android.app.Activity;
+import android.content.ContentResolver;
+import android.database.Cursor;
+import android.net.Uri;
+import android.os.Bundle;
+import android.view.View;
+import android.view.View.OnClickListener;
+import android.widget.Button;
+import android.widget.EditText;
+public class ContentConsumerActivity extends Activity {
+    ContentResolver cr;
+    @Override
+    public void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        setContentView(R.layout.main);
+        cr=this.getContentResolver();
+        //初始化查询按钮
+        Button b=(Button)this.findViewById(R.id.Button01);
+        b.setOnClickListener(
+          new OnClickListener(){
+			@Override
+			public void onClick(View v) {
+				String stuname="Android";				
+				Cursor cur=cr.query(
+				   Uri.parse("content://com.bn.pp4.provider.student/stu"), 
+				   new String[]{"sno","stuname","sage","sclass"}, 
+				   "stuname=?", 
+				   new String[]{stuname}, 
+				   "sage ASC"
+				);	
+	        	while(cur.moveToNext()){
+	        		String sno=cur.getString(0);
+	        		String sname=cur.getString(1);
+	        		int sage=cur.getInt(2);
+	        		String sclass=cur.getString(3);
+	        		appendMessage(sno+"\t"+sname+"\t\t"+sage+"\t"+sclass);
+	        	}
+	        	cur.close();
+	}});}
+    public void appendMessage(String msg){    //向文本区中添加文本
+    	EditText et=(EditText)this.findViewById(R.id.EditText02);
+    	et.append(msg+"\n");
+}}