当我运行我的应用程序时崩溃可以有人帮助我，并指导我正确的方向使这个代码工作？
public class DeviceInfoActivity extends Activity {
private static final String APP_NAME = "SignalLevelSample";
private static final int EXCELLENT_LEVEL = 75;
private static final int GOOD_LEVEL = 50;
private static final int MODERATE_LEVEL = 25;
private static final int WEAK_LEVEL = 0;
private static final int INFO_SERVICE_STATE_INDEX = 0;
private static final int INFO_CELL_LOCATION_INDEX = 1;
private static final int INFO_CALL_STATE_INDEX = 2;
private static final int INFO_CONNECTION_STATE_INDEX = 3;
private static final int INFO_SIGNAL_LEVEL_INDEX = 4;
private static final int INFO_SIGNAL_LEVEL_INFO_INDEX = 5;
private static final int INFO_DATA_DIRECTION_INDEX = 6;
private static final int INFO_DEVICE_INFO_INDEX = 7;
private static final int[] info_ids= {
R.id.serviceState_info,
R.id.cellLocation_info,
R.id.callState_info,
R.id.connectionState_info,
R.id.signalLevel,
R.id.signalLevelInfo,
R.id.dataDirection,
R.id.device_info
};
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
startSignalLevelListener();
displayTelephonyInfo();
}
@Override
protected void onPause()
{
super.onPause();
stopListening();
}
@Override
protected void onResume()
{
super.onResume();
startSignalLevelListener();
}
@Override
protected void onDestroy()
{
stopListening();
super.onDestroy();
}
private void setTextViewText(int id,String text) {
((TextView)findViewById(id)).setText(text);
}
private void setSignalLevel(int id,int infoid,int level){
int progress = (int) ((((float)level)/31.0) * 100);
String signalLevelString = getSignalLevelString(progress);
((ProgressBar)findViewById(id)).setProgress(progress);
((TextView)findViewById(infoid)).setText(signalLevelString);
Log.i("signalLevel ","" + progress);
}
private String getSignalLevelString(int level) {
String signalLevelString = "Weak";
if(level > EXCELLENT_LEVEL) signalLevelString = "Excellent";
else if(level > GOOD_LEVEL) signalLevelString = "Good";
else if(level > MODERATE_LEVEL) signalLevelString = "Moderate";
else if(level > WEAK_LEVEL) signalLevelString = "Weak";
return signalLevelString;
}
private void stopListening(){
TelephonyManager tm = (TelephonyManager) getSystemService(TELEPHONY_SERVICE);
tm.listen(phoneStateListener, PhoneStateListener.LISTEN_NONE);
}
private void setDataDirection(int id, int direction){
int resid = getDataDirectionRes(direction);
((ImageView)findViewById(id)).setImageResource(resid);
}
private int getDataDirectionRes(int direction){
int resid = R.drawable.ic_launcher;
switch(direction)
{
case TelephonyManager.DATA_ACTIVITY_IN: resid = R.drawable.ic_launcher; break;
case TelephonyManager.DATA_ACTIVITY_OUT: resid = R.drawable.ic_launcher; break;
case TelephonyManager.DATA_ACTIVITY_INOUT: resid = R.drawable.ic_launcher; break;
case TelephonyManager.DATA_ACTIVITY_NONE: resid = R.drawable.ic_launcher; break;
default: resid = R.drawable.ic_launcher; break;
}
return resid;
}
private void startSignalLevelListener() {
TelephonyManager tm = (TelephonyManager) getSystemService(TELEPHONY_SERVICE);
int events = PhoneStateListener.LISTEN_SIGNAL_STRENGTH |
PhoneStateListener.LISTEN_DATA_ACTIVITY |
PhoneStateListener.LISTEN_CELL_LOCATION |
PhoneStateListener.LISTEN_CALL_STATE |
PhoneStateListener.LISTEN_CALL_FORWARDING_INDICATOR |
PhoneStateListener.LISTEN_DATA_CONNECTION_STATE |
PhoneStateListener.LISTEN_MESSAGE_WAITING_INDICATOR |
PhoneStateListener.LISTEN_SERVICE_STATE;
tm.listen(phoneStateListener, events);
}
private void displayTelephonyInfo(){
TelephonyManager tm = (TelephonyManager) getSystemService(TELEPHONY_SERVICE);
GsmCellLocation loc = (GsmCellLocation) tm.getCellLocation();
int cellid = loc.getCid();
int lac = loc.getLac();
String deviceid = tm.getDeviceId();
String phonenumber = tm.getLine1Number();
String softwareversion = tm.getDeviceSoftwareVersion();
String operatorname = tm.getNetworkOperatorName();
String simcountrycode = tm.getSimCountryIso();
String simoperator = tm.getSimOperatorName();
String simserialno = tm.getSimSerialNumber();
String subscriberid = tm.getSubscriberId();
String networktype = getNetworkTypeString(tm.getNetworkType());
String phonetype = getPhoneTypeString(tm.getPhoneType());
logString("CellID: " + cellid);
logString("LAC: " + lac);
logString("Device ID: " + deviceid);
logString("Phone Number: " + phonenumber);
logString("Software Version: " + softwareversion);
logString("Operator Name: " + operatorname);
logString("SIM Country Code: " + simcountrycode);
logString("SIM Operator: " + simoperator);
logString("SIM Serial No.: " + simserialno);
logString("Sibscriber ID: " + subscriberid);
String deviceinfo = "";
deviceinfo += ("CellID: " + cellid + "\n");
deviceinfo += ("LAC: " + lac + "\n");
deviceinfo += ("Device ID: " + deviceid + "\n");
deviceinfo += ("Phone Number: " + phonenumber + "\n");
deviceinfo += ("Software Version: " + softwareversion + "\n");
deviceinfo += ("Operator Name: " + operatorname + "\n");
deviceinfo += ("SIM Country Code: " + simcountrycode + "\n");
deviceinfo += ("SIM Operator: " + simoperator + "\n");
deviceinfo += ("SIM Serial No.: " + simserialno + "\n");
deviceinfo += ("Subscriber ID: " + subscriberid + "\n");
deviceinfo += ("Network Type: " + networktype + "\n");
deviceinfo += ("Phone Type: " + phonetype + "\n");
List<NeighboringCellInfo> cellinfo = tm.getNeighboringCellInfo();
if(null != cellinfo){
for(NeighboringCellInfo info: cellinfo){
deviceinfo += ("\tCellID: " + info.getCid() + ", RSSI: " + info.getRssi() + "\n");
}
}
setTextViewText(info_ids[INFO_DEVICE_INFO_INDEX],deviceinfo);
}
private String getNetworkTypeString(int type){
String typeString = "Unknown";
switch(type)
{
case TelephonyManager.NETWORK_TYPE_EDGE: typeString = "EDGE"; break;
case TelephonyManager.NETWORK_TYPE_GPRS: typeString = "GPRS"; break;
case TelephonyManager.NETWORK_TYPE_UMTS: typeString = "UMTS"; break;
default: typeString = "UNKNOWN"; break;
}
return typeString;
}
private String getPhoneTypeString(int type){
String typeString = "Unknown";
switch(type)
{
case TelephonyManager.PHONE_TYPE_GSM: typeString = "GSM"; break;
case TelephonyManager.PHONE_TYPE_NONE: typeString = "UNKNOWN"; break;
default: typeString = "UNKNOWN"; break;
}
return typeString;
}
private int logString(String message) {
return Log.i(APP_NAME,message);
}
private final PhoneStateListener phoneStateListener = new PhoneStateListener(){
@Override
public void onCallForwardingIndicatorChanged(boolean cfi)
{
Log.i(APP_NAME, "onCallForwardingIndicatorChanged " + cfi);
super.onCallForwardingIndicatorChanged(cfi);
}
@Override
public void onCallStateChanged(int state, String incomingNumber)
{
String callState = "UNKNOWN";
switch(state)
{
case TelephonyManager.CALL_STATE_IDLE: callState = "IDLE"; break;
case TelephonyManager.CALL_STATE_RINGING: callState = "Ringing (" + incomingNumber + ")"; break;
case TelephonyManager.CALL_STATE_OFFHOOK: callState = "Offhook"; break;
}
setTextViewText(info_ids[INFO_CALL_STATE_INDEX],callState);
Log.i(APP_NAME, "onCallStateChanged " + callState);
super.onCallStateChanged(state, incomingNumber);
}
@Override
public void onCellLocationChanged(CellLocation location)
{
String locationString = location.toString();
setTextViewText(info_ids[INFO_CELL_LOCATION_INDEX],locationString);
Log.i(APP_NAME, "onCellLocationChanged " + locationString);
super.onCellLocationChanged(location);
}
@Override
public void onDataActivity(int direction)
{
String directionString = "none";
switch(direction)
{
case TelephonyManager.DATA_ACTIVITY_IN: directionString = "IN"; break;
case TelephonyManager.DATA_ACTIVITY_OUT: directionString = "OUT"; break;
case TelephonyManager.DATA_ACTIVITY_INOUT: directionString = "INOUT"; break;
case TelephonyManager.DATA_ACTIVITY_NONE: directionString = "NONE"; break;
default: directionString = "UNKNOWN: " + direction; break;
}
setDataDirection(info_ids[INFO_DATA_DIRECTION_INDEX],direction);
Log.i(APP_NAME, "onDataActivity " + directionString);
super.onDataActivity(direction);
}
@Override
public void onDataConnectionStateChanged(int state)
{
String connectionState = "Unknown";
switch(state)
{
case TelephonyManager.DATA_CONNECTED: connectionState = "Connected"; break;
case TelephonyManager.DATA_CONNECTING: connectionState = "Connecting"; break;
case TelephonyManager.DATA_DISCONNECTED: connectionState = "Disconnected"; break;
case TelephonyManager.DATA_SUSPENDED: connectionState = "Suspended"; break;
default: connectionState = "Unknown: " + state; break;
}
setTextViewText(info_ids[INFO_CONNECTION_STATE_INDEX],connectionState);
Log.i(APP_NAME, "onDataConnectionStateChanged " + connectionState);
super.onDataConnectionStateChanged(state);
}
@Override
public void onMessageWaitingIndicatorChanged(boolean mwi)
{
Log.i(APP_NAME, "onMessageWaitingIndicatorChanged " + mwi);
super.onMessageWaitingIndicatorChanged(mwi);
}
@Override
public void onServiceStateChanged(ServiceState serviceState)
{
String serviceStateString = "UNKNOWN";
switch(serviceState.getState())
{
case ServiceState.STATE_IN_SERVICE: serviceStateString = "IN SERVICE"; break;
case ServiceState.STATE_EMERGENCY_ONLY: serviceStateString = "EMERGENCY ONLY"; break;
case ServiceState.STATE_OUT_OF_SERVICE: serviceStateString = "OUT OF SERVICE"; break;
case ServiceState.STATE_POWER_OFF: serviceStateString = "POWER OFF"; break;
default: serviceStateString = "UNKNOWN"; break;
}
setTextViewText(info_ids[INFO_SERVICE_STATE_INDEX],serviceStateString);
Log.i(APP_NAME, "onServiceStateChanged " + serviceStateString);
super.onServiceStateChanged(serviceState);
}
@Override
public void onSignalStrengthChanged(int asu)
{
Log.i(APP_NAME, "onSignalStrengthChanged " + asu);
setSignalLevel(info_ids[INFO_SIGNAL_LEVEL_INDEX],info_ids[INFO_SIGNAL_LEVEL_INFO_INDEX],asu);
super.onSignalStrengthChanged(asu);
}
};
}
// ======================== XML
<?xml version="1.0" encoding="utf-8"?>
<ScrollView xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:orientation="vertical"
android:scrollbarStyle="insideOverlay"
android:scrollbarAlwaysDrawVerticalTrack="false">
<LinearLayout
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent">
<LinearLayout
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:orientation="horizontal">
<TextView android:text="Serivice State" style="@style/labelStyleRight"/>
<TextView android:id="@+id/serviceState_info" style="@style/textStyle"/>
</LinearLayout>
<LinearLayout
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:orientation="horizontal">
<TextView android:text="Cell Location" style="@style/labelStyleRight"/>
<TextView android:id="@+id/cellLocation_info" style="@style/textStyle"/>
</LinearLayout>
<LinearLayout
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:orientation="horizontal">
<TextView android:text="Call State" style="@style/labelStyleRight"/>
<TextView android:id="@+id/callState_info" style="@style/textStyle"/>
</LinearLayout>
<LinearLayout
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:orientation="horizontal">
<TextView android:text="Connection State" style="@style/labelStyleRight"/>
<TextView android:id="@+id/connectionState_info" style="@style/textStyle"/>
</LinearLayout>
<LinearLayout
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:orientation="horizontal">
<TextView android:text="Signal Level" style="@style/labelStyleRight"/>
<LinearLayout
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_weight="0.5"
android:orientation="horizontal">
<ProgressBar android:id="@+id/signalLevel" style="@style/progressStyle"/>
<TextView android:id="@+id/signalLevelInfo" style="@style/textSmallStyle"/>
</LinearLayout>
</LinearLayout>
<LinearLayout
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:orientation="horizontal">
<TextView android:text="Data" style="@style/labelStyleRight"/>
<ImageView android:id="@+id/dataDirection" style="@style/imageStyle"/>
</LinearLayout>
<TextView android:id="@+id/device_info" style="@style/labelStyleLeft"/>
</LinearLayout>
</ScrollView>
// =================
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="sirisak.phone"
android:versionCode="1"
android:versionName="1.0" >
<uses-sdk android:minSdkVersion="8" />
<application android:icon="@drawable/ic_launcher" android:label="@string/app_name">
<activity android:name=".DeviceInfoActivity "
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>
<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION"></uses-permission>
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE"></uses-permission>
<uses-permission android:name="android.permission.CHANGE_NETWORK_STATE"></uses-permission>
<uses-permission android:name="android.permission.READ_PHONE_STATE"></uses-permission>
<uses-permission android:name="android.permission.ACCESS_COARSE_UPDATES"></uses-permission>
</manifest>
答案 0 :(得分：1)
您需要添加：
android:name="android.app.Application"
到application中的AndroidManifest.xml标记。
这是因为你有一个ClassCastException。请参阅：android classcastexception on activity startup