我正在android中制作一个应用程序。当用户移动手机时，我正在尝试使用 Type_orientation 来移动屏幕上的引号。因此，当用户将手机向左移动时，下一个引号会出现在屏幕上，而当用户将手机向右移动时，前一个引号会出现在屏幕上。我设置了 25 的限制。但我的问题是，一旦手机转到位置 25，所有保存在数据库中的报价都会以幻灯片的形式出现。我只想转到下一个报价，而不是让所有报价都显示为幻灯片。我能做些什么？谁能帮我解决这个问题？
这是我的课
package com.example.prova1;
import java.util.HashMap;
import android.app.Activity;
import android.content.Context;
import android.content.Intent;
import android.database.Cursor;
import android.database.sqlite.SQLiteDatabase;
import android.hardware.Sensor;
import android.hardware.SensorEvent;
import android.hardware.SensorEventListener;
import android.hardware.SensorManager;
import android.os.Bundle;
import android.widget.TextView;
public class SlideQuote extends Activity implements SensorEventListener
{
//a TextView
private TextView quote;
private TextView author;
//the Sensor Manager
private SensorManager sManager;
float xLast,xCurrent;
int id;
int total;
float x;
boolean first=true;
String s1,s2;
Database quotedatabase = new Database(this);
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.slide_quote);
//get the TextView from the layout file
quote = (TextView) findViewById(R.id.textView3);
author = (TextView) findViewById(R.id.textView4);
id=1;
//get a hook to the sensor service
sManager= (SensorManager) getSystemService(Context.SENSOR_SERVICE);
if(sManager.getSensorList(Sensor.TYPE_ORIENTATION).size()!=0){
Sensor s =sManager.getSensorList(Sensor.TYPE_ORIENTATION).get(o);
sManager.registerListener(this,s ,SensorManager.SENSOR_DELAY_NORMAL);
s1= quotedatabase.getQuote(id);
s2= quotedatabase.getAuthor(id);
total=quotedatabase.getQuotesCount();
quote.setText(s1);
author.setText(s2);
}
}
//when this Activity starts
@Override
protected void onResume()
{
super.onResume();
/*register the sensor listener to listen to the gyroscope sensor, use the
callbacks defined in this class, and gather the sensor information as quick
as possible*/
sManager.registerListener(this, sManager.getDefaultSensor(Sensor.TYPE_ORIENTATION),SensorManager.SENSOR_DELAY_NORMAL);
}
//When this Activity isn't visible anymore
@Override
protected void onStop()
{
//unregister the sensor listener
sManager.unregisterListener(this);
super.onStop();
}
@Override
public void onAccuracyChanged(Sensor arg0, int arg1)
{
//Do nothing.
}
@Override
public void onSensorChanged(SensorEvent event)
{
try {
Thread.sleep(50);
} catch (InterruptedException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
//if sensor is unreliable, return void
if (event.accuracy == SensorManager.SENSOR_STATUS_UNRELIABLE)
{
return;
}
if(first){
xLast=0;
}
else
{
xLast=xCurrent;
}
//else it will output the Roll, Pitch and Yawn values
xCurrent=event.values[2];
x=xCurrent-xLast;
if(-1<xCurrent& xCurrent<1)
{
}
else{
if(x<=5&x>=-5){
}
else{
if(x>25 ){
if(id==total)
{id=1;
}
else{
id++;
}
s1= quotedatabase.getQuote(id);
s2= quotedatabase.getAuthor(id);
quote.setText(s1);
author.setText(s2);
}
else{
if(x<-25){
if(id==1)
{id=total;}
else{
id--;}
s1= quotedatabase.getQuote(id);
s2= quotedatabase.getAuthor(id);
quote.setText(s1);
author.setText(s2);
}
}
}
}
}
@Override
public void onBackPressed() {
// TODO Auto-generated method stub
sManager.unregisterListener(this);
Intent backIntent = new Intent(getApplication(), Quote.class);
finish();
startActivity(backIntent);
}
}
我认为问题出在这部分
@Override
public void onSensorChanged(SensorEvent event)
{
try {
Thread.sleep(50);
} catch (InterruptedException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
//if sensor is unreliable, return void
if (event.accuracy == SensorManager.SENSOR_STATUS_UNRELIABLE)
{
return;
}
if(first){
xLast=0;
}
else
{
xLast=xCurrent;
}
//else it will output the Roll, Pitch and Yawn values
xCurrent=event.values[2];
x=xCurrent-xLast;
if(-1<xCurrent& xCurrent<1)
{
}
else{
if(x<=5&x>=-5){
}
else{
if(x>25 ){
if(id==total)
{id=1;
}
else{
id++;
}
s1= quotedatabase.getQuote(id);
s2= quotedatabase.getAuthor(id);
quote.setText(s1);
author.setText(s2);
}
else{
if(x<-25){
if(id==1)
{id=total;}
else{
id--;}
s1= quotedatabase.getQuote(id);
s2= quotedatabase.getAuthor(id);
quote.setText(s1);
author.setText(s2);
}
}
}
}
}
任何人都可以帮助我吗？