参看前面：
之前创建的数据
Book表中，通过values传入一组数据
数据中有 price要修改
来修改原来的数据
apply plugin: 'com.android.application'
android {
compileSdkVersion 24
buildToolsVersion "24.0.2"
defaultConfig {
applicationId "com.example.litepaltest"
minSdkVersion 15
targetSdkVersion 24
versionCode 1
versionName "1.0"
}
buildTypes {
release {
minifyEnabled false
proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
}
}
}
dependencies {
compile fileTree(dir: 'libs', include: ['*.jar'])
testCompile 'junit:junit:4.12'
compile 'com.android.support:appcompat-v7:24.2.1'
compile 'org.litepal.android:core:1.3.2'
}
package com.example.litepaltest;
import org.litepal.crud.DataSupport;
public class Book extends DataSupport {
private int id;
private String author;
private double price;
private int pages;
private String name;
private String press;
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
public String getAuthor() {
return author;
}
public void setAuthor(String author) {
this.author = author;
}
public double getPrice() {
return price;
}
public void setPrice(double price) {
this.price = price;
}
public int getPages() {
return pages;
}
public void setPages(int pages) {
this.pages = pages;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getPress() {
return press;
}
public void setPress(String press) {
this.press = press;
}
}
package com.example.litepaltest;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.Button;
import org.litepal.crud.DataSupport;
import org.litepal.tablemanager.Connector;
import java.util.List;
public class MainActivity extends AppCompatActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Button createDatabase = (Button) findViewById(R.id.create_database);
createDatabase.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Connector.getDatabase();
}
});
}
}
package com.example.litepaltest;
import org.litepal.crud.DataSupport;
public class Book extends DataSupport {
private int id;
private String author;
private double price;
private int pages;
private String name;
private String press;
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
public String getAuthor() {
return author;
}
public void setAuthor(String author) {
this.author = author;
}
public double getPrice() {
return price;
}
public void setPrice(double price) {
this.price = price;
}
public int getPages() {
return pages;
}
public void setPages(int pages) {
this.pages = pages;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getPress() {
return press;
}
public void setPress(String press) {
this.press = press;
}
}
package com.example.litepaltest;
public class Category {
private int id;
private String categoryName;
private int categoryCode;
public void setId(int id) {
this.id = id;
}
public void setCategoryName(String categoryName) {
this.categoryName = categoryName;
}
public void setCategoryCode(int categoryCode) {
this.categoryCode = categoryCode;
}
}
Button addData = (Button) findViewById(R.id.add_data);
addData.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Book book = new Book();
book.setName("The Da Vinci Code");
book.setAuthor("Dan Brown");
book.setPages(454);
book.setPrice(16.96);
book.setPress("Unknow");
book.save();
}
});
Button updateData = (Button) findViewById(R.id.update_data);
updateData.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Book book = new Book();
book.setPrice(14.95);
book.setPress("Anchor");
book.updateAll("name = ? and author = ?", "The Lost Symbol", "Dan Brown");
}
});
Button deleteButton = (Button) findViewById(R.id.delete_data);
deleteButton.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
DataSupport.deleteAll(Book.class, "price < ?", "15");
}
});
Button queryButton = (Button) findViewById(R.id.query_data);
queryButton.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
List books = DataSupport.findAll(Book.class);
for (Book book: books) {
Log.d("MainActivity", "book name is " + book.getName());
Log.d("MainActivity", "book author is " + book.getAuthor());
Log.d("MainActivity", "book pages is " + book.getPages());
Log.d("MainActivity", "book price is " + book.getPrice());
Log.d("MainActivity", "book press is " + book.getPress());
}
}
});
文件工程：
1AndroidManifest
2数据库
3 类
MainActivity
package com.example.litepaltest;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.Button;
import org.litepal.crud.DataSupport;
import org.litepal.tablemanager.Connector;
import java.util.List;
public class MainActivity extends AppCompatActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Button createDatabase = (Button) findViewById(R.id.create_database);
createDatabase.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Connector.getDatabase();
}
});
Button addData = (Button) findViewById(R.id.add_data);
addData.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Book book = new Book();
book.setName("The Da Vinci Code");
book.setAuthor("Dan Brown");
book.setPages(454);
book.setPrice(16.96);
book.setPress("Unknow");
book.save();
}
});
Button updateData = (Button) findViewById(R.id.update_data);
updateData.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Book book = new Book();
book.setPrice(14.95);
book.setPress("Anchor");
book.updateAll("name = ? and author = ?", "The Lost Symbol", "Dan Brown");
}
});
Button deleteButton = (Button) findViewById(R.id.delete_data);
deleteButton.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
DataSupport.deleteAll(Book.class, "price < ?", "15");
}
});
Button queryButton = (Button) findViewById(R.id.query_data);
queryButton.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
List books = DataSupport.findAll(Book.class);
for (Book book: books) {
Log.d("MainActivity", "book name is " + book.getName());
Log.d("MainActivity", "book author is " + book.getAuthor());
Log.d("MainActivity", "book pages is " + book.getPages());
Log.d("MainActivity", "book price is " + book.getPrice());
Log.d("MainActivity", "book press is " + book.getPress());
}
}
});
}
}
Book
package com.example.litepaltest;
import org.litepal.crud.DataSupport;
public class Book extends DataSupport {
private int id;
private String author;
private double price;
private int pages;
private String name;
private String press;
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
public String getAuthor() {
return author;
}
public void setAuthor(String author) {
this.author = author;
}
public double getPrice() {
return price;
}
public void setPrice(double price) {
this.price = price;
}
public int getPages() {
return pages;
}
public void setPages(int pages) {
this.pages = pages;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getPress() {
return press;
}
public void setPress(String press) {
this.press = press;
}
}Category
package com.example.litepaltest;
public class Category {
private int id;
private String categoryName;
private int categoryCode;
public void setId(int id) {
this.id = id;
}
public void setCategoryName(String categoryName) {
this.categoryName = categoryName;
}
public void setCategoryCode(int categoryCode) {
this.categoryCode = categoryCode;
}
}
4 主布局