标签：android style blog http color java os io
1，Main_activity的xmL配置
1 <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" 2 xmlns:tools="http://schemas.android.com/tools" 3 android:layout_width="match_parent" 4 android:layout_height="match_parent" 5 android:background="@drawable/b3" 6 android:orientation="vertical" 7 tools:context="${relativePackage}.${activityClass}" > 8 9 <TextView 10 android:layout_width="match_parent" 11 android:layout_height="15dp" 12 android:background="#56a692" 13 android:gravity="bottom" 14 android:text="@string/main_name1" 15 android:textColor="#fff" 16 android:textSize="12sp" /> 17 18 <TextView 19 android:layout_width="match_parent" 20 android:layout_height="80dp" 21 android:gravity="center" 22 android:text="@string/main_name1" 23 android:textSize="20sp" 24 android:textStyle="italic" /> 25 26 <TextView 27 android:layout_width="match_parent" 28 android:layout_height="38dp" 29 android:background="#CD661D" /> 30 31 <TextView 32 android:layout_width="match_parent" 33 android:layout_height="30dp" 34 android:text="@string/main_name6" 35 android:textSize="15sp" 36 android:textStyle="italic" /> 37 38 <EditText 39 android:id="@+id/editText1" 40 android:layout_width="match_parent" 41 android:layout_height="wrap_content" 42 android:layout_marginTop="15dp" 43 android:ems="10" 44 android:hint="@string/main_name2" > 45 46 <requestFocus /> 47 </EditText> 48 49 <EditText 50 android:id="@+id/editText2" 51 android:layout_width="match_parent" 52 android:layout_height="wrap_content" 53 android:layout_marginTop="34dp" 54 android:ems="10" 55 android:hint="@string/main_name3" /> 56 57 <TextView 58 android:layout_width="match_parent" 59 android:layout_height="60dp" 60 android:layout_weight="0.00" /> 61 62 <TextView 63 android:layout_width="match_parent" 64 android:layout_height="38dp" 65 android:background="#CD661D" /> 66 67 <LinearLayout 68 android:layout_width="wrap_content" 69 android:layout_height="wrap_content" 70 android:layout_weight="0.31" 71 android:orientation="horizontal" > 72 73 <Button 74 android:id="@+id/button1" 75 android:layout_width="155dp" 76 android:layout_height="wrap_content" 77 android:text="@string/main_name4" /> 78 79 <Button 80 android:id="@+id/button2" 81 android:layout_width="164dp" 82 android:layout_height="wrap_content" 83 android:text="@string/main_name5" /> 84 </LinearLayout> 85 86 <TextView 87 android:layout_width="match_parent" 88 android:layout_height="50dp" 89 android:background="#EECFA1" /> 90 91 </LinearLayout>
2，Register_activity 的XML配置
1 <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" 2 xmlns:tools="http://schemas.android.com/tools" 3 android:layout_width="match_parent" 4 android:layout_height="match_parent" 5 android:background="@drawable/b1" 6 android:orientation="vertical" 7 tools:context="${relativePackage}.${activityClass}" > 8 9 <TextView 10 android:layout_width="match_parent" 11 android:layout_height="15dp" 12 android:background="#56a692" 13 android:gravity="bottom" 14 android:text="@string/register_name" 15 android:textColor="#fff" 16 android:textSize="12sp" /> 17 18 <TextView 19 android:layout_width="match_parent" 20 android:layout_height="wrap_content" 21 android:gravity="center" 22 android:text="@string/register_name6" 23 android:textColor="#B22222" 24 android:textSize="20sp" 25 android:textStyle="italic" /> 26 27 <TextView 28 android:layout_width="wrap_content" 29 android:layout_height="100dp" 30 android:gravity="bottom" /> 31 32 <TextView 33 android:layout_width="match_parent" 34 android:layout_height="wrap_content" 35 android:background="#B2DFEE" 36 android:gravity="bottom" 37 android:text="@string/register_name7" 38 android:textStyle="italic" /> 39 40 <EditText 41 android:id="@+id/etid" 42 android:layout_width="match_parent" 43 android:layout_height="wrap_content" 44 android:ems="10" 45 android:hint="@string/register_name2" > 46 47 <requestFocus /> 48 </EditText> 49 50 <TextView 51 android:layout_width="match_parent" 52 android:layout_height="wrap_content" 53 android:gravity="center" 54 android:textColor="#B22222" 55 android:textSize="20sp" 56 android:textStyle="italic" /> 57 58 <EditText 59 android:id="@+id/etname" 60 android:layout_width="match_parent" 61 android:layout_height="wrap_content" 62 android:ems="10" 63 android:hint="@string/register_name3" /> 64 65 <TextView 66 android:layout_width="match_parent" 67 android:layout_height="wrap_content" 68 android:background="#B2DFEE" 69 android:gravity="center" 70 android:textColor="#B22222" 71 android:textSize="20sp" 72 android:textStyle="italic" /> 73 74 <LinearLayout 75 android:layout_width="wrap_content" 76 android:layout_height="0dp" 77 android:layout_weight="0.84" 78 android:orientation="horizontal" > 79 80 <Button 81 android:id="@+id/btn_qu" 82 android:layout_width="155dp" 83 android:layout_height="wrap_content" 84 android:text="@string/register_name4" /> 85 86 <Button 87 android:id="@+id/btn_sure" 88 android:layout_width="163dp" 89 android:layout_height="wrap_content" 90 android:text="@string/register_name5" /> 91 </LinearLayout> 92 93 <TextView 94 android:layout_width="match_parent" 95 android:layout_height="50dp" 96 android:background="#EECFA1" /> 97 98 </LinearLayout>
3，SQLite的配置创建数据库和表
例如：新建类sqliteopenhelper
package com.example.dbtest; import android.content.Context; import android.database.sqlite.SQLiteDatabase; import android.database.sqlite.SQLiteOpenHelper; //新建类Sqliteopenhelper 继承于SQLiteOpenHelper public class Sqliteopenhelper extends SQLiteOpenHelper { //数据库名： private static final String DBNAME="test.db"; //表名 private static final String TABLENAME="student"; private static final String GOODSNAME="goods"; //版本号：具体我也不知道是什么，照着写就行了 private static final int TESTVERSION=1; public Sqliteopenhelper(Context context) { super(context, DBNAME, null, TESTVERSION); // TODO Auto-generated constructor stub } //初始化，创建表 @Override public void onCreate(SQLiteDatabase db) { // TODO Auto-generated method stub String sql1="create table"+" "+TABLENAME+"(id varchar,name varchar)"; String sql2="create table"+" "+GOODSNAME+"(LF varchar,name varchar,miaoshu varchar)"; db.execSQL(sql1); db.execSQL(sql2); } //失败后删除，重新创建 @Override public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) { // TODO Auto-generated method stub if(newVersion>oldVersion) { String sql1="drop table if exists"+TABLENAME; String sql2="drop table if exists"+GOODSNAME; db.execSQL(sql1); db.execSQL(sql2); this.onCreate(db); } } }
4，Main_activity.java 调用并且实现验证数据库内信息
1 package com.example.dbtest; 2 3 import android.app.Activity; 4 import android.app.AlertDialog; 5 import android.app.AlertDialog.Builder; 6 import android.content.DialogInterface; 7 import android.content.Intent; 8 import android.database.Cursor; 9 import android.database.sqlite.SQLiteDatabase; 10 import android.database.sqlite.SQLiteException; 11 import android.database.sqlite.SQLiteOpenHelper; 12 import android.os.Bundle; 13 import android.view.View; 14 import android.view.View.OnClickListener; 15 import android.widget.Button; 16 import android.widget.EditText; 17 import android.widget.Toast; 18 19 public class MainActivity extends Activity { 20 21 private EditText et_id, et_name; 22 private Button btn_test, btn_local; 23 //1,SQLite的声明 24 SQLiteOpenHelper helper; 25 private String _id; 26 private String _name; 27 28 @Override 29 protected void onCreate(Bundle savedInstanceState) { 30 super.onCreate(savedInstanceState); 31 setContentView(R.layout.activity_main); 32 // 2，数据库的创建，及调用 33 helper = new Sqliteopenhelper(this); 34 helper.getWritableDatabase(); 35 36 et_id = (EditText) findViewById(R.id.editText1); 37 et_name = (EditText) findViewById(R.id.editText2); 38 btn_test = (Button) findViewById(R.id.button1); 39 btn_local = (Button) findViewById(R.id.button2); 40 41 btn_test.setOnClickListener(new testListener()); 42 btn_local.setOnClickListener(new localListener()); 43 44 } 45 46 class testListener implements OnClickListener { 47 48 @Override 49 public void onClick(View v) { 50 // TODO Auto-generated method stub 51 Intent intent = new Intent(MainActivity.this, Register.class); 52 startActivity(intent); 53 } 54 55 } 56 //登陆按钮 57 58 class localListener implements OnClickListener { 59 60 @Override 61 public void onClick(View v) { 62 // TODO Auto-generated method stub 63 _id = et_id.getText().toString(); 64 _name = et_name.getText().toString(); 65 if (_name.equals("") || _id.equals("")) { Toast.makeText(getApplicationContext(), "请输入账号密 码！",Toast.LENGTH_SHORT).show(); 66 } else { 67 sureuser(_id, _name); 68 } 69 } 70 71 } 72 73 private void sureuser(String userid, String username) { 74 //3,数据库的操作，查询 75 SQLiteDatabase sdb = helper.getReadableDatabase(); 76 try { 77 String sql = "select * from student where id=? and name=?"; 78 // 实现遍历id和name 79 Cursor cursor = sdb.rawQuery(sql, new String[] { _id, _name }); 80 if (cursor.getCount() > 0) { 81 Intent intent = new Intent(MainActivity.this, User.class); 82 Bundle bundle = new Bundle(); 83 bundle.putString("name", _name); 84 intent.putExtras(bundle); 85 startActivity(intent); 86 } else { 87 Toast.makeText(getApplicationContext(), "登录失败", 88 Toast.LENGTH_SHORT).show(); 89 } 90 cursor.close(); 91 sdb.close(); 92 } catch (SQLiteException e) { 93 oast.makeText(getApplicationContext(), "亲，请注册！", 94 Toast.LENGTH_SHORT).show(); 95 } 96 } 97 98 99 100 101 }
5，Register_activity.java
package com.example.dbtest; import android.app.Activity; import android.content.ContentValues; import android.content.Intent; import android.database.sqlite.SQLiteDatabase; import android.database.sqlite.SQLiteException; import android.database.sqlite.SQLiteOpenHelper; import android.os.Bundle; import android.view.View; import android.view.View.OnClickListener; import android.widget.Button; import android.widget.EditText; import android.widget.Toast; public class Register extends Activity { private EditText etid,etname; private Button btn_qu,btn_sure; SQLiteOpenHelper helper; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_register); helper=new Sqliteopenhelper(this); helper.getWritableDatabase(); etid=(EditText)findViewById(R.id.etid); etname=(EditText)findViewById(R.id.etname); btn_qu=(Button)findViewById(R.id.btn_qu); btn_sure=(Button)findViewById(R.id.btn_sure); btn_sure.setOnClickListener(new sureListener()); btn_qu.setOnClickListener(new quListener()); } class sureListener implements OnClickListener{ @Override public void onClick(View v) { // TODO Auto-generated method stub try{ SQLiteDatabase sdb=helper.getWritableDatabase(); ContentValues values=new ContentValues(); values.put("id",etid.getText().toString()); values.put("name",etname.getText().toString()); sdb.insert("student",null, values); Toast.makeText(getApplicationContext(), "注册成功", Toast.LENGTH_SHORT).show(); Intent intent=new Intent(Register.this,User.class); Bundle bundle=new Bundle(); bundle.putString("name",etname.getText().toString()); intent.putExtras(bundle); startActivity(intent);; } catch(SQLiteException e) {Toast.makeText(getApplicationContext(), "注册失败", Toast.LENGTH_SHORT).show();} } } class quListener implements OnClickListener{ @Override public void onClick(View v) { // TODO Auto-generated method stub Intent intent=new Intent(Register.this,MainActivity.class); startActivity(intent); } } }
6,效果图所示
注：图片自己引用
【原创】android——SQLite实现简单的注册登陆（已经美化）,布布扣,bubuko.com
【原创】android——SQLite实现简单的注册登陆（已经美化）
标签：android style blog http color java os io
原文地址：http://www.cnblogs.com/LABELNET/p/3900300.html
