电池电量获得.doc

电池电量获得:package com.lee0000.BatteryCount;import android.app.Activity;import android.app.Dialog;import android.content.BroadcastReceiver;import android.content.Context;import android.content.Intent;import android.content.IntentFilter;import android.os.Bundle;import android.view.View;import android.view.Window;import android.view.WindowManager;import android.widget.Button;import android.widget.TextView;public class BatteryCount extends Activity /* Called when the activity is first created. */private int intLevel;private int intScale;private Button mButton01;private BroadcastReceiver mBatInfoReceiver = new BroadcastReceiver()public void onReceive(Context context,Intent intent)String action = intent.getAction();if(Intent.ACTION_BATTERY_CHANGED.equals(action)intLevel = intent.getIntExtra(level,0);intScale = intent.getIntExtra(scale, 100);onBatteryInfoReceiver(intLevel,intScale);Override public void onCreate(Bundle savedInstanceState) super.onCreate(savedInstanceState); setContentView(R.layout.main); mButton01 = (Button) findViewById(R.id.myButton1); mButton01.setOnClickListener(new Button.OnClickListener()Overridepublic void onClick(View v) / TODO Auto-generated method stubregisterReceiver(mBatInfoReceiver, new IntentFilter(Intent.ACTION_BATTERY_CHANGED); ); public void onBatteryInfoReceiver(int intLevel,int intScale)final Dialog d = new Dialog(BatteryCount.this); d.setTitle(R.string.str_dialog_title);d.setContentView(R.layout.mydialog);Window window = d.getWindow();window.setFlags(WindowManager.LayoutParams.FLAG_BLUR_BEHIND, WindowManager.LayoutParams.FLAG_BLUR_BEHIND);TextView mTextView02 = (TextView) d.findViewById(R.id.mytextView2);mTextView02.setText(getResources().getString(R.string.str_dialog_body)+String.valueOf(intLevel * 100 / intScale)+%);Button mButton02 = (Button) d.findViewById(R.id.button2);mButton02.setOnClickListener(new Button.OnClickListener()Overridepublic void onClick(View v) / TODO Auto-generated method stubunregisterReceiver(mBatInfoReceiver);d.dismiss(););d.show();解题思路： 1. 设计主界面UI，以LinearLayout嵌套布局，加上组件：进度条SeekBar、专辑封面、以及5个控制按钮iamgeButton(上一首、停止、开始、暂停、下一首)。2. 实现主界面activitiy ，从main.xml布局中获得ImageButton对象、进度条对象,设置按钮监听器，监听器方法。由于要有后台播放功能。在点击播放按钮时，启动一个service，只有点击停止按钮，才能停止该service。3. 实现service功能，并在onStart方法启动一个MediaPlayer对象，播放音乐；在onDestroy中停止服务和音乐。4. 在manifest.xml中注册服务。程序运行截图：实现代码：package com.android.lee0000;import android.app.Activity;import android.content.Intent;import android.os.Bundle;import android.view.View;import android.view.View.OnClickListener;import android.widget.Button;import android.widget.ImageButton;public class HomeWorkII extends Activity /* Called when the activity is first created. */ Override public void onCreate(Bundle savedInstanceState) super.onCreate(savedInstanceState); setContentView(R.layout.main); /获得button1的id ImageButton button1 = (ImageButton)findViewById(R.id.ImageButton03); /建立监听器 button1.setOnClickListener(startIt); /获得button2的id ImageButton button2 = (ImageButton)findViewById(R.id.ImageButton02); /建立监听器 button2.setOnClickListener(stopIt); private OnClickListener startIt = new OnClickListener() public void onClick(View v) /启动指定名字的服务 startService(new Intent(com.studio.android.START_AUDIO_SERVICE); ; private OnClickListener stopIt = new OnClickListener() public void onClick(View v) /启动指定名字的服务 stopService(new Intent(com.studio.android.START_AUDIO_SERVICE); finish(); ;package com.android.lee0000;import android.app.Service;import android.content.Intent;import android.media.MediaPlayer;import android.os.IBinder;public class Music extends Service /这是一个在MediaPlay的对象player private MediaPlayer player;Overridepublic IBinder onBind(Intent intent) / TODO Auto-generated method stubreturn null;/播放开启public void onStart(Intent intent, int startId) super.onStart(intent, startId); /开始时播放的文件名，播放的文件命名是a-z，0-9 player = MediaPlayer.create(this, R.drawable.jayrainbow); player.start(); /播放结束，释放资源 public void onDestroy() super.onDestroy(); player.stop(); package XMLandSQL;import java.awt.Color;import java.awt.Container;import java.awt.GridLayout;import java.awt.event.ActionEvent;import java.awt.event.ActionListener;import java.awt.event.FocusEvent;import java.awt.event.FocusListener;import javax.swing.JButton;import javax.swing.JFrame;import javax.swing.JLabel;import javax.swing.JTextField;public class XMLandSQL extends JFrame implements ActionListenerprivate JLabel jLabelName;private JLabel jLabelPassword;private JTextField jTextFieldName;private JTextField jTextFieldPassword;private JButton jButtonLogin;private JButton jLoginButton;private JButton jButtonClear;public XMLandSQL(String title)super(title);jLabelName = new JLabel(用户名:);jLabelPassword = new JLabel(密码:);jTextFieldName = new JTextField();jTextFieldName.setText(请输入SQL数据库的登陆名字);jTextFieldName.setForeground(Color.gray);jTextFieldName.addFocusListener(new textFieldNameFocusListener();jTextFieldPassword = new JTextField();jTextFieldPassword.setText(请输入SQL数据库的密码);jTextFieldPassword.setForeground(Color.gray);jTextFieldPassword.addFocusListener(new textFieldPasswordFocusListener();jButtonLogin = new JButton(数据库导入到XML);jButtonLogin.addActionListener(this);jLoginButton = new JButton(XML导入到数据库);jLoginButton.addActionListener(this);jButtonClear = new JButton(清除);jButtonClear.addActionListener(this);Container contentPane = this.getContentPane();contentPane.setLayout(new GridLayout(4,2);contentPane.add(jLabelName);contentPane.add(jTextFieldName);contentPane.add(jLabelPassword);contentPane.add(jTextFieldPassword);contentPane.add(jButtonLogin);contentPane.add(jLoginButton);contentPane.add(jButtonClear);setBounds(80, 60, 400, 550);setVisible(true);setDefaultCloseOperation(EXIT_ON_CLOSE);public static void main(String a)new XMLandSQL();private class textFieldNameFocusListener implements FocusListenerOverridepublic void focusGained(FocusEvent e) / TODO Auto-generated method stubif(jTextFieldName.getForeground().equals(Color.gray)jTextFieldName.setText();jTextFieldName.setForeground(Color.BLACK); Overridepublic void focusLost(FocusEvent e) / TODO Auto-generated method stubif(jTextFieldName.getText().trim().isEmpty()jTextFieldName.setText(请输入SQL数据库的登陆名字);jTextFieldName.setForeground(Color.gray);private class textFieldPasswordFocusListener implements FocusListenerOverridepublic void focusGained(FocusEvent e) / TODO Auto-generated method stubif(jTextFieldPassword.getForeground().equals(Color.gray)jTextFieldPassword.setText();jTextFieldPassword.setForeground(Color.BLACK);Overridepublic void focusLost(FocusEvent e) / TODO Auto-generated method stubif(jTextFieldPassword.getText().trim().isEmpty()jTextFieldPassword.setText(请输入SQL数据库的密码);jTextFieldPassword.setForeground(Color.gray);Overridepublic void actionPerformed(ActionEvent e) / TODO Auto-generated method stubif(e.getActionCommand().equals(清除)jTextFieldName.setText();jTextFieldPassword.setText();else if(e.getActionCommand().equals(数据库导入到XML)if(!(jTextFieldName.getText().trim().isEmpty()&(!(jTextFieldName.getForeground().equals(Color.gray)&(!(jTextFieldName.getText().trim().isEmpty()&(!(jTextFieldName.getForeground().equals(Color.gray)new append(root,MYangel);else if(e.getActionCommand().equals(XML导入到数据库)if(!(jTextFieldName.getText().trim().isEmpty()&(!(jTextFieldName.getForeground().equals(Color.gray)&(!(jTextFieldName.getText().trim().isEmpty()&(!(jTextFieldName.getForeground().equals(Color.gray)if(jTextFieldName.getText().equals(root)&(jTextFieldPassword.getText().equals(MYangel)dom4j d = new dom4j();d.dom4j();package XMLandSQL;import java.io.File;import java.sql.Connection;import java.sql.DriverManager;import java.sql.ResultSet;import java.sql.Statement;import javax.xml.parsers.DocumentBuilder;import javax.xml.parsers.DocumentBuilderFactory;import javax.xml.transform.Transformer;import javax.xml.transform.TransformerFactory;import javax.xml.transform.dom.DOMSource;import javax.xml.transform.stream.StreamResult;import org.w3c.dom.Document;import org.w3c.dom.Element;import org.w3c.dom.NamedNodeMap;import org.w3c.dom.Node;import org.w3c.dom.NodeList;import org.w3c.dom.Text;public class append static String log;static String pass;public append(String log,String pass)this.log = log;this.pass = pass;tryDocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();DocumentBuilder builder = factory.newDocumentBuilder();Document doc = builder.parse(schema.xml);doc.normalize();Element root = doc.getDocumentElement();accessDB(doc,root);if(doc!=null)printNode(root);TransformerFactory tf = TransformerFactory.newInstance();Transformer transformer = tf.newTransformer();DOMSource source = new DOMSource(doc);StreamResult result = new StreamResult(new File(schema.xml);transformer.transform(source, result);catch(Exception e)e.printStackTrace();/访问数据库public static void accessDB(Document doc,Element root)tryClass.forName(com.mysql.jdbc.Driver);Connection con = DriverManager.getConnection(jdbc:mysql:/localhost/lee00002008,log,pass);Statement stmt = con.createStatement();ResultSet rs = stmt.executeQuery(select * from users);createXML(doc,root,rs);rs.close();stmt.close();con.close();catch(Exception e)e.printStackTrace();/创建XML结点public static void createXML(Document doc,Element root,ResultSet rs)tryboolean flag = rs.next();while(flag)Element Users = doc.createElement(Users);Element userid = doc.createElement(userid);Text userid_text = doc.createTextNode