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我有一个数据库，一个主要活动和4个按钮。我试图让按钮在点击时向数据库发送一个数字值，然后当单击另一个按钮时显示一个附有数字值的视图，例如点击这4个按钮的总和。在SQL数据库中插入值，将它们加在一起并比较reult
如何分配数值来点击按钮并将值发送到我拥有的数据库？ 如何添加（总和）数据库中的值并将它们与我想要的值进行比较？
classdbOpenHelper.class
import android.content.Context;
import android.database.sqlite.SQLiteDatabase;
import android.database.sqlite.SQLiteOpenHelper;
public class classdbOpenHelper extends SQLiteOpenHelper {
public static final String KEY_ROWID = "_id";
public static final String KEY_NUMBER = "btnumber";
public static final String KEY_RESULT = "result";
public static final String DATABASE_NAME= "data";
public static final String DATABASE_TABLE = "tabel";
public static final int DATABASE_VERSION = 1;
public classdbOpenHelper(Context context) {
super(context, DATABASE_NAME, null, DATABASE_VERSION);
// TODO Auto-generated constructor stub
}
@Override
public void onCreate(SQLiteDatabase db) {
db.execSQL("CREATE TABLE" + DATABASE_TABLE + " (" +
KEY_ROWID + " INTEGER PRIMARY KEY AUTOINCREMENT " +
KEY_NUMBER + " INTEGER " +
KEY_RESULT + " INTEGER); "
);
}
@Override
public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
// TODO Auto-generated method stub
db.execSQL("DROP TABLE IF EXITS " + DATABASE_TABLE);
onCreate(db);
}}
MainActivity.class
import android.os.Bundle;
import android.app.Activity;
import android.database.Cursor;
import android.view.Menu;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.ImageButton;
import android.widget.ScrollView;
public class MainActivity extends Activity {
DBAdapter myDb;
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_goto_start);
openDB();
//Buttons for start screen
ImageButton clicks =(ImageButton)findViewById(R.id.clicks);
ImageButton new_test_btn =(ImageButton)findViewById(R.id.new_test_btn);
ImageButton view_profile_btn =(ImageButton)findViewById(R.id.view_profile_btn);
ImageButton home_btn =(ImageButton)findViewById(R.id.home_btn);
ImageButton info_btn =(ImageButton)findViewById(R.id.info_btn);
//Buttons for question_1
Button a1_btn =(Button)findViewById(R.id.a1_btn);
Button b1_btn =(Button)findViewById(R.id.b1_btn);
Button next_btn1 =(Button)findViewById(R.id.next_btn1);
//Buttons for question_2
Button a2_btn =(Button)findViewById(R.id.a2_btn);
Button b2_btn =(Button)findViewById(R.id.b2_btn);
Button next_btn2 =(Button)findViewById(R.id.next_btn2);
Button back_btn1 =(Button)findViewById(R.id.back_btn1);
//Buttons for question_3
Button a3_btn =(Button)findViewById(R.id.a3_btn);
Button b3_btn =(Button)findViewById(R.id.b3_btn);
Button next_btn3 =(Button)findViewById(R.id.next_btn3);
Button back_btn2 =(Button)findViewById(R.id.back_btn2);
//Buttons for question_4
Button a4_btn =(Button)findViewById(R.id.a3_btn);
Button b4_btn =(Button)findViewById(R.id.b3_btn);
Button result_btn =(Button)findViewById(R.id.result_btn);
Button back_btn3 =(Button)findViewById(R.id.back_btn3);
//Answers
ScrollView eerner =(ScrollView)findViewById(R.id.eerner_scroll);
//Click on screen to start
clicks.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
View startpage = (View)findViewById(R.id.startpage);
View homepage = (View)findViewById(R.id.homepage);
homepage.setVisibility(View.GONE);
startpage.setVisibility(View.VISIBLE);};});
//Click a1 and b1 !!!!!!!
a1_btn.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
long newId = myDb.insertRow("A1", 1);
};});
//Click result
result_btn.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
Cursor cursor = myDb.getAllRows();
displayRecordSet(cursor);
}
private void displayRecordSet(Cursor cursor) {
String message = "Hi";
if(cursor.getLong(columnIndex))
displayText(message);
}
;});
//Click for question_1
new_test_btn.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
View startpage = (View)findViewById(R.id.startpage);
View question_1 = (View)findViewById(R.id.question_1);
startpage.setVisibility(View.GONE);
question_1.setVisibility(View.VISIBLE);};});
//Click for question_2
next_btn1.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
View question_1 = (View)findViewById(R.id.question_1);
View question_2 = (View)findViewById(R.id.question_2);
question_1.setVisibility(View.GONE);
question_2.setVisibility(View.VISIBLE);};});
//Go back to question_1
back_btn1.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
View question_2 = (View)findViewById(R.id.question_2);
View question_1 = (View)findViewById(R.id.question_1);
question_2.setVisibility(View.GONE);
question_1.setVisibility(View.VISIBLE);};});
//Click for question_3
next_btn2.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
View question_2 = (View)findViewById(R.id.question_2);
View question_3 = (View)findViewById(R.id.question_3);
question_2.setVisibility(View.GONE);
question_3.setVisibility(View.VISIBLE);};});
//Go back to question_2
back_btn2.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
View question_3 = (View)findViewById(R.id.question_3);
View question_2 = (View)findViewById(R.id.question_2);
question_3.setVisibility(View.GONE);
question_2.setVisibility(View.VISIBLE);};});
//Click for question_4
next_btn3.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
View question_3 = (View)findViewById(R.id.question_3);
View question_4 = (View)findViewById(R.id.question_4);
question_3.setVisibility(View.GONE);
question_4.setVisibility(View.VISIBLE);};});
//Go back to question_3
back_btn3.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
View question_4 = (View)findViewById(R.id.question_4);
View question_3 = (View)findViewById(R.id.question_3);
question_4.setVisibility(View.GONE);
question_3.setVisibility(View.VISIBLE);};});
//Click for info screen
info_btn.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
View startpage = (View)findViewById(R.id.startpage);
ScrollView frameinfo = (ScrollView)findViewById(R.id.frameinfo);
View answers = (View)findViewById(R.id.answers);
startpage.setVisibility(View.GONE);
frameinfo.setVisibility(View.VISIBLE);
answers.setVisibility(View.VISIBLE);};});
//Click for home
home_btn.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
View startpage = (View)findViewById(R.id.startpage);
View homepage = (View)findViewById(R.id.homepage);
startpage.setVisibility(View.GONE);
homepage.setVisibility(View.VISIBLE);};});
//Click for view profile
view_profile_btn.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
View startpage = (View)findViewById(R.id.startpage);
View answers = (View)findViewById(R.id.answers);
ScrollView eerner_scroll = (ScrollView)findViewById(R.id.eerner_scroll);
startpage.setVisibility(View.GONE);
eerner_scroll.setVisibility(View.VISIBLE);
answers.setVisibility(View.VISIBLE);};});
}
private void openDB() {
myDb = new DBAdapter(this);
myDb.open();
}
protected void onDestroy() {
super.onDestroy();
closeDB();
}
private void closeDB() {
myDb.close();
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.goto_start, menu);
return true;
}}
你错过了创建查询中的昏迷。 – njzk2