Java Eclipse Android项目在启动后立即强制关闭?
我正在通过Eclipse为android编写一个加速计应用程序。我是Java编程新手(这是我的第四个应用程序)。运行应用程序时,它会打开,但在应用程序崩溃和我的设备返回主屏幕之前,textview1甚至不会显示。有什么想法吗?!我进行了研究,但其他人的问题与我的不同(问题包括:抽象类、Java Eclipse Android项目在启动后立即强制关闭?,java,android,Java,Android,我正在通过Eclipse为android编写一个加速计应用程序。我是Java编程新手(这是我的第四个应用程序)。运行应用程序时,它会打开,但在应用程序崩溃和我的设备返回主屏幕之前,textview1甚至不会显示。有什么想法吗?!我进行了研究,但其他人的问题与我的不同(问题包括:抽象类、在xml中,以及其他一些问题) 附件是我的MainActivity.java、activity_main.xml和我的清单 MainActivity.java package com.example.acceler
在xml中,以及其他一些问题) 附件是我的MainActivity.java、activity_main.xml和我的清单 MainActivity.java
package com.example.accelerometer;
import android.app.Activity;
import android.content.Context;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.hardware.Sensor;
import android.hardware.SensorEvent;
import android.hardware.SensorEventListener;
import android.hardware.SensorManager;
import android.os.Bundle;
import android.view.Menu;
import android.view.View;
import android.widget.ImageView;
import android.widget.TextView;
public class MainActivity extends Activity implements SensorEventListener{
float [] history = new float[3];
private int mIndex = 0;
private int[] mImgs = new int[3];
public Bitmap mBitMap;
public TextView mTextView;
public ImageView mImage;
private SensorManager senSensorManager;
private Sensor senAccelerometer;
private long lastUpdate = 0;
private float last_x, last_y, last_z;
private static final int SHAKE_THRESHOLD = 600;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
mImgs[0] = R.drawable.left;
mImgs[1] = R.drawable.right;
mImgs[2] = R.drawable.up;
mImgs[3] = R.drawable.down;
mImage = (ImageView) findViewById(R.id.imageView1);
// mTextView = (TextView) findViewById(R.id.textView1);
mBitMap = BitmapFactory.decodeResource(getResources(), mImgs[mIndex]);
mImage.setImageResource(mImgs[mIndex]); // Easiest way to show a image
senSensorManager = (SensorManager) getSystemService(Context.SENSOR_SERVICE);
senAccelerometer = senSensorManager.getDefaultSensor(Sensor.TYPE_ACCELEROMETER);
senSensorManager.registerListener(this, senAccelerometer , SensorManager.SENSOR_DELAY_NORMAL);
}
@Override
public void onSensorChanged(SensorEvent event) {
Sensor mySensor = event.sensor;
long curTime = System.currentTimeMillis();
if ((curTime - lastUpdate) > 100) {
long diffTime = (curTime - lastUpdate);
lastUpdate = curTime;
if (mySensor.getType() == Sensor.TYPE_ACCELEROMETER) {
float xChange = history[0] - event.values[0];
float yChange = history[1] - event.values[1];
float zChange = history[2] - event.values[2];
history[0] = event.values[0];
history[1] = event.values[1];
history[2] = event.values[2];
if ((Math.abs(xChange) > 2) || (Math.abs(yChange) > 2) || (Math.abs(zChange) > 2))
{
if ((xChange > yChange) && (xChange > zChange))
{
if (xChange > 2){
//Left
// mIndex++;
// if (mIndex == 3) { mIndex = 0; } // Overflow
mBitMap = BitmapFactory.decodeResource(getResources(), mImgs[0]);
mImage.setImageBitmap(mBitMap);
mImage.setVisibility(View.VISIBLE);
}
else if (xChange < -2){
//Right
mBitMap = BitmapFactory.decodeResource(getResources(), mImgs[1]);
mImage.setImageBitmap(mBitMap);
mImage.setVisibility(View.VISIBLE);
}
}
if ((yChange > xChange) && (yChange > zChange))
if (yChange > 2)
{
//Down
mBitMap = BitmapFactory.decodeResource(getResources(), mImgs[2]);
mImage.setImageBitmap(mBitMap);
mImage.setVisibility(View.VISIBLE);
}
else if (yChange < -2){
//Up
mBitMap = BitmapFactory.decodeResource(getResources(), mImgs[3]);
mImage.setImageBitmap(mBitMap);
mImage.setVisibility(View.VISIBLE);
}
}
if ((zChange > xChange) && (zChange > yChange))
{
if (zChange > 2){
//Out
mBitMap = BitmapFactory.decodeResource(getResources(), mImgs[0]);
mImage.setImageBitmap(mBitMap);
mImage.setVisibility(View.VISIBLE);
}
else if (zChange < -2){
//In
mBitMap = BitmapFactory.decodeResource(getResources(), mImgs[0]);
mImage.setImageBitmap(mBitMap);
mImage.setVisibility(View.VISIBLE);
}
}
}
//
//
// float speed = Math.abs(x + y + z - last_x - last_y - last_z)/ diffTime * 10000;
//
// if (speed > SHAKE_THRESHOLD) {
//
// }
//
// last_x = x;
// last_y = y;
// last_z = z;
}
}
@Override
public void onAccuracyChanged(Sensor sensor, int accuracy) {
}
protected void onPause() {
super.onPause();
senSensorManager.unregisterListener(this);
}
protected void onResume() {
super.onResume();
senSensorManager.registerListener(this, senAccelerometer, SensorManager.SENSOR_DELAY_NORMAL);
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.main, menu);
return true;
}
}
package com.example.accelerator;
导入android.app.Activity;
导入android.content.Context;
导入android.graphics.Bitmap;
导入android.graphics.BitmapFactory;
导入android.hardware.Sensor;
导入android.hardware.SensorEvent;
导入android.hardware.SensorEventListener;
导入android.hardware.SensorManager;
导入android.os.Bundle;
导入android.view.Menu;
导入android.view.view;
导入android.widget.ImageView;
导入android.widget.TextView;
公共类MainActivity扩展活动实现SensorEventListener{
浮动[]历史=新浮动[3];
私有int mIndex=0;
私有int[]mImgs=新int[3];
公共位图mBitMap;
公共文本视图mTextView;
公共图像视图;
私人传感器管理器传感器管理器;
专用传感器;
private long lastUpdate=0;
私人浮动last_x,last_y,last_z;
私有静态最终int-SHAKE_阈值=600;
@凌驾
创建时受保护的void(Bundle savedInstanceState){
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
mImgs[0]=R.drawable.left;
mImgs[1]=R.drawable.right;
mImgs[2]=R.drawable.up;
mImgs[3]=R.可缩进深度;
mImage=(ImageView)findViewById(R.id.imageView1);
//mTextView=(TextView)findViewById(R.id.textView1);
mBitMap=BitmapFactory.decodeResource(getResources(),mImgs[mIndex]);
setImageResource(mImgs[mIndex]);//显示图像的最简单方法
senSensorManager=(SensorManager)getSystemService(Context.SENSOR\u SERVICE);
SenAccelerator=senSensorManager.getDefaultSensor(传感器类型\加速计);
senSensorManager.registerListener(此、senAccelerator、SensorManager.SENSOR\u延迟\u正常);
}
@凌驾
传感器更改时的公共无效(传感器事件){
传感器mySensor=event.Sensor;
long curTime=System.currentTimeMillis();
如果((curTime-lastUpdate)>100){
long diffTime=(curTime-lastUpdate);
lastUpdate=curTime;
if(mySensor.getType()==Sensor.TYPE\u加速计){
float xChange=历史[0]-事件值[0];
float yChange=历史[1]-事件值[1];
float zChange=历史[2]-事件值[2];
历史记录[0]=事件值[0];
历史记录[1]=事件值[1];
历史记录[2]=事件值[2];
if((数学abs(xChange)>2)|(数学abs(yChange)>2)|(数学abs(zChange)>2))
{
如果((xChange>yChange)和&(xChange>zChange))
{
如果(交换>2){
//左
//mIndex++;
//如果(mIndex==3){mIndex=0;}//溢出
mBitMap=BitmapFactory.decodeResource(getResources(),mImgs[0]);
设置图像位图(mBitMap);
mImage.setVisibility(View.VISIBLE);
}
否则如果(交换<-2){
//对
mBitMap=BitmapFactory.decodeResource(getResources(),mImgs[1]);
设置图像位图(mBitMap);
mImage.setVisibility(View.VISIBLE);
}
}
如果((yChange>xChange)和&(yChange>zChange))
如果(yChange>2)
{
//向下
mBitMap=BitmapFactory.decodeResource(getResources(),mImgs[2]);
设置图像位图(mBitMap);
mImage.setVisibility(View.VISIBLE);
}
否则如果(yChange<-2){
//向上
mBitMap=BitmapFactory.decodeResource(getResources(),mImgs[3]);
设置图像位图(mBitMap);
mImage.setVisibility(View.VISIBLE);
}
}
如果((zChange>xChange)和&(zChange>yChange))
{
如果(zChange>2){
//出去
mBitMap=BitmapFactory.decodeResource(getResources(),mImgs[0]);
设置图像位图(mBitMap);
mImage.setVisibility(View.VISIBLE);
}
否则如果(zChange<-2){
//在
mBitMap=BitmapFactory.decodeResource(getResources(),mImgs[0]);
设置图像位图(mBitMap);
mImage.setVisibility(View.VISIBLE);
}
}
}
//
//
//浮动速度=Math.abs(x+y+z-last_x-last_y-last_z)/diffTime*10000;
//
//如果(速度>抖动阈值){
//
// }
//
//最后的x=x;
//最后的y=y;
//last_z=z;
}
}
@凌驾
精度更改时的公共无效(传感器,int精度){
}
受保护的void onPause(){
super.onPause();
senSensorManager.unregisterListener(此);
}
受保护的void onResume(){
super.onResume();
senSensorManager.registerListener(此、senAccelerator、SensorManager.SENSOR\u延迟\u正常);
}
@凌驾
公共布尔onCreateOption
<RelativeLayout 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:paddingBottom="@dimen/activity_vertical_margin"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
tools:context=".MainActivity" >
<TextView
android:id="@+id/textView1"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:gravity="center"
android:text="@string/hello_world" />
<ImageView
android:id="@+id/imageView1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_below="@+id/textView1"
android:layout_centerHorizontal="true"
android:layout_marginTop="90dp"
android:src="@drawable/up"
android:visibility="invisible" />
</RelativeLayout>
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.accelerometer"
android:versionCode="1"
android:versionName="1.0" >
<uses-sdk
android:minSdkVersion="8"
android:targetSdkVersion="18" />
<application
android:allowBackup="true"
android:icon="@drawable/ic_launcher"
android:label="@string/app_name"
android:theme="@style/AppTheme" >
<activity
android:name="com.example.accelerometer.MainActivity"
android:screenOrientation="portrait"
android:label="@string/app_name" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>
</manifest>
private int[] mImgs = new int[3]; // mImgs is an array of 3 elements
mImgs[0] = R.drawable.left; // first element
mImgs[1] = R.drawable.right; // second
mImgs[2] = R.drawable.up; // third and final possible element of the array
mImgs[3] = R.drawable.down; // this throws the ArrayIndexOutOfBoundsException as mImgs[3] is not a valid index for an array of size 3