继续接上文:
Android 使用 Greendao 操作 db sqlite
布局文件:
activity_test_green.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
tools:context=".TestGreenActivity"> <Button
android:id="@+id/btn_all"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:onClick="optGreen"
android:text="获取所有" /> <Button
android:id="@+id/btn_add"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:onClick="optGreen"
android:text="添加数据" /> <Button
android:id="@+id/btn_update"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:onClick="optGreen"
android:text="更新数据" /> <Button
android:id="@+id/btn_del"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:onClick="optGreen"
android:text=" 删除数据" /> <Button
android:id="@+id/btn_clear"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:onClick="optGreen"
android:text=" 清除数据" /> </LinearLayout>
调用代码:
package com.jack.testmd; import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.util.Log;
import android.view.View; import com.jack.testmd.application.MyApplication;
import com.jack.testmd.greendao.DBManager;
import com.jack.testmd.greendao.UserInfoDao;
import com.jack.testmd.model.UserInfo; import java.util.List; public class TestGreenActivity extends AppCompatActivity {
private final String TAG = DBManager.class.getSimpleName();
private UserInfoDao userInfoDao = DBManager.get().getUserInfoDao(); @Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_test_green);
} protected void optGreen(View v) { switch (v.getId()) {
case R.id.btn_all:
List<UserInfo> list = userInfoDao.loadAll();
for (int i = 0; i < list.size(); i++) {
Log.i(TAG, "id:" + list.get(i).getId() + ",name:" + list.get(i).getUserName() + ",age:" + list.get(i).getAge());
}
break;
case R.id.btn_add:
UserInfo userInfo = new UserInfo(1, "a001", 10);
userInfoDao.insert(userInfo);
break;
case R.id.btn_update:
UserInfo userInfo2 = new UserInfo(1, "b001", 10);
userInfoDao.update(userInfo2);
break;
case R.id.btn_del:
userInfoDao.deleteByKey((long) 1);
break;
case R.id.btn_clear:
userInfoDao.deleteAll();
break;
}
}
}
方法二:封装DaoUtils类,然后在MainActivity中调用DaoUtils
Android 使用 Greendao 操作 db sqlite(2)-- 封装DaoUtils类
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本文原文地址:https://www.cnblogs.com/wukong1688/p/10705622.html
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