我是android平台的新手。我有问题。当我运行我的应用程序时，出现错误“应用程序已意外停止”
我尝试了一些解决方案，但我不明白它仍然无法正常工作。
有人可以帮助我吗？
我的代码
package com.example.popup;
import android.app.Activity;
import android.app.AlertDialog;
import android.content.DialogInterface;
import android.content.Intent;
import android.os.Bundle;
public class PopSMSActivity extends Activity {
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
// no need for XML layouts right now
// we will use a dialog instead
//setContentView(R.layout.main);
// retrieve Serializable sms message object
// by the key "msg" used to pass it
Intent in = this.getIntent();
PopMessage msg = (PopMessage) in.getSerializableExtra("msg");
// Case where we launch the app to test the UI
// i.e. no incoming SMS
if(msg == null){
msg = new PopMessage();
msg.setSender("0123456789");
msg.setTimestamp( System.currentTimeMillis() );
msg.setBody(" this is a test SMS message!");
}
showDialog(msg);
}
private void showDialog(PopMessage msg){
final String sender = msg.getSender();
final String body = msg.getBody();
final String display = sender + "\n"
+ msg.getShortDate( msg.getTimestamp() )+ "\n"
+ body + "\n";
// Display in Alert Dialog
AlertDialog.Builder builder = new AlertDialog.Builder(this);
builder.setMessage(display)
.setCancelable(false)
.setPositiveButton("Reply", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int id) {
// reply by calling SMS program
// smsReply(sender, body);
}
})
.setNegativeButton("Close", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int id) {
// go back to the phone home screen
// goHome();
}
});
AlertDialog alert = builder.create();
alert.show();
}
}
弹出法
package com.example.popup;
import android.os.Bundle;
import android.app.Activity;
import android.view.Menu;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.telephony.SmsMessage;
public class PopUpAct extends BroadcastReceiver {
@Override
public void onReceive(Context context, Intent intent) {
// TODO Auto-generated method stub
Bundle bundle = intent.getExtras();
//get the sms received
Object[] pdus = (Object[]) bundle.get("pdus");
SmsMessage[] msgs = new SmsMessage[pdus.length];
String smsSender = "";
String smsBody = "";
long timestamp = 0L;
for (int i=0; i<msgs.length;i++){
msgs[i] = SmsMessage.createFromPdu((byte[])pdus[i]);
smsSender += msgs[i].getOriginatingAddress();
smsBody += msgs[i].getMessageBody().toString();
timestamp += msgs[i].getTimestampMillis();
}
intent.putExtra("sender",smsSender);
intent.putExtra("body", smsBody);
intent.putExtra("timestamp",timestamp);
PopMessage pop_msg = new PopMessage();
intent.setClass(context, PopSMSActivity.class);
intent.setFlags(intent.FLAG_ACTIVITY_NEW_TASK);
intent.putExtra("msg", pop_msg);
context.startActivity(intent);
}
}
弹出消息
package com.example.popup;
import java.io.Serializable;
import java.sql.Date;
import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.GregorianCalendar;
public class PopMessage implements Serializable{
private String sender;
private String body;
private long timestamp;
public String getSender() {
return sender;
}
public void setSender(String sender) {
this.sender = sender;
}
public String getBody() {
return body;
}
public void setBody(String body) {
this.body = body;
}
public long getTimestamp() {
return timestamp;
}
public void setTimestamp(long timestamp) {
this.timestamp = timestamp;
}
public String getShortDate(long timestamp){
Date date = new Date(timestamp);
Calendar cal = new GregorianCalendar();
SimpleDateFormat sdf = new SimpleDateFormat("E MMM dd hh:mmaa");
sdf.setCalendar(cal);
cal.setTime(date);
return sdf.format(date);
}
}
这是日志
06-04 08:14:38.387: E/AndroidRuntime(285): FATAL EXCEPTION: main
06-04 08:14:38.387: E/AndroidRuntime(285): java.lang.RuntimeException: Unable to instantiate activity ComponentInfo{com.example.popup/com.example.popup.PopUpAct}: java.lang.ClassCastException: com.example.popup.PopUpAct
06-04 08:14:38.387: E/AndroidRuntime(285): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2585)
06-04 08:14:38.387: E/AndroidRuntime(285): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2679)
06-04 08:14:38.387: E/AndroidRuntime(285): at android.app.ActivityThread.access$2300(ActivityThread.java:125)
06-04 08:14:38.387: E/AndroidRuntime(285): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2033)
06-04 08:14:38.387: E/AndroidRuntime(285): at android.os.Handler.dispatchMessage(Handler.java:99)
06-04 08:14:38.387: E/AndroidRuntime(285): at android.os.Looper.loop(Looper.java:123)
06-04 08:14:38.387: E/AndroidRuntime(285): at android.app.ActivityThread.main(ActivityThread.java:4627)
06-04 08:14:38.387: E/AndroidRuntime(285): at java.lang.reflect.Method.invokeNative(Native Method)
06-04 08:14:38.387: E/AndroidRuntime(285): at java.lang.reflect.Method.invoke(Method.java:521)
06-04 08:14:38.387: E/AndroidRuntime(285): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868)
06-04 08:14:38.387: E/AndroidRuntime(285): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626)
06-04 08:14:38.387: E/AndroidRuntime(285): at dalvik.system.NativeStart.main(Native Method)
06-04 08:14:38.387: E/AndroidRuntime(285): Caused by: java.lang.ClassCastException: com.example.popup.PopUpAct
06-04 08:14:38.387: E/AndroidRuntime(285): at android.app.Instrumentation.newActivity(Instrumentation.java:1021)
06-04 08:14:38.387: E/AndroidRuntime(285): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2577)
06-04 08:14:38.387: E/AndroidRuntime(285): ... 11 more