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我對android非常陌生，所以不要責怪我的錯誤，如果你可以嘗試幫助我。 我的應用程序開始正常，但只要我嘗試切換到另一個活動，它就表示我的應用程序「不幸停住」。在那個活動中，我有一個微調器，我想從中讀取所選項目並將這些信息存儲在我的數據庫中。 這裏是日誌文本：Android：無法加載活動
03-01 21:54:01.392: E/Trace(625): error opening trace file: No such file or directory (2)
03-01 21:54:01.882: D/dalvikvm(625): GC_FOR_ALLOC freed 62K, 4% free 7991K/8259K, paused 75ms, total 78ms
03-01 21:54:01.892: I/dalvikvm-heap(625): Grow heap (frag case) to 9.317MB for 1536016-byte allocation
03-01 21:54:01.982: D/dalvikvm(625): GC_CONCURRENT freed <1K, 4% free 9491K/9799K, paused 33ms+6ms, total 92ms
03-01 21:54:02.533: D/gralloc_goldfish(625): Emulator without GPU emulation detected.
03-01 21:54:03.062: D/dalvikvm(625): GC_CONCURRENT freed 12K, 2% free 9866K/9991K, paused 5ms+26ms, total 224ms
03-01 21:54:06.322: D/AndroidRuntime(625): Shutting down VM
03-01 21:54:06.322: W/dalvikvm(625): threadid=1: thread exiting with uncaught exception (group=0x40a13300)
03-01 21:54:06.352: E/AndroidRuntime(625): FATAL EXCEPTION: main
03-01 21:54:06.352: E/AndroidRuntime(625): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.s_home/com.example.s_home.Osvetlenie}: java.lang.ClassCastException: com.example.s_home.Osvetlenie cannot be cast to android.widget.AdapterView$OnItemSelectedListener
03-01 21:54:06.352: E/AndroidRuntime(625): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2059)
03-01 21:54:06.352: E/AndroidRuntime(625): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2084)
03-01 21:54:06.352: E/AndroidRuntime(625): at android.app.ActivityThread.access $600(ActivityThread.java:130)
03-01 21:54:06.352: E/AndroidRuntime(625): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1195)
03-01 21:54:06.352: E/AndroidRuntime(625): at android.os.Handler.dispatchMessage(Handler.java:99)
03-01 21:54:06.352: E/AndroidRuntime(625): at android.os.Looper.loop(Looper.java:137)
03-01 21:54:06.352: E/AndroidRuntime(625): at android.app.ActivityThread.main(ActivityThread.java:4745)
03-01 21:54:06.352: E/AndroidRuntime(625): at java.lang.reflect.Method.invokeNative(Native Method)
03-01 21:54:06.352: E/AndroidRuntime(625): at java.lang.reflect.Method.invoke(Method.java:511)
03-01 21:54:06.352: E/AndroidRuntime(625): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:786)
03-01 21:54:06.352: E/AndroidRuntime(625): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553)
03-01 21:54:06.352: E/AndroidRuntime(625): at dalvik.system.NativeStart.main(Native Method)
03-01 21:54:06.352: E/AndroidRuntime(625): Caused by: java.lang.ClassCastException: com.example.s_home.Osvetlenie cannot be cast to android.widget.AdapterView$OnItemSelectedListener
03-01 21:54:06.352: E/AndroidRuntime(625): at com.example.s_home.Osvetlenie.onCreate(Osvetlenie.java:30)
03-01 21:54:06.352: E/AndroidRuntime(625): at android.app.Activity.performCreate(Activity.java:5008)
03-01 21:54:06.352: E/AndroidRuntime(625): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1079)
03-01 21:54:06.352: E/AndroidRuntime(625): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2023)
03-01 21:54:06.352: E/AndroidRuntime(625): ... 11 more
03-01 21:54:14.143: I/Process(625): Sending signal. PID: 625 SIG: 9
這裏是一個崩潰的活動：
package com.example.s_home;
import com.example.s_home.DBAdapter;
import android.os.Bundle;
import android.annotation.SuppressLint;
import android.annotation.TargetApi;
import android.app.Activity;
import android.content.Intent;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.AdapterView.OnItemSelectedListener;
import android.widget.ArrayAdapter;
import android.widget.Spinner;
import android.support.v4.app.NavUtils;
import android.widget.AdapterView;
import android.widget.Adapter;
public class Osvetlenie extends Activity {
@TargetApi(11)
@SuppressLint("NewApi")
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_osvetlenie);
Spinner spinner = (Spinner) findViewById(R.id.house_spinner);
spinner.setOnItemSelectedListener((OnItemSelectedListener) this);
ArrayAdapter<CharSequence> adapter = ArrayAdapter.createFromResource (this,R.array.house_arrays, android.R.layout.simple_spinner_item);
adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
spinner.setAdapter(adapter);
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
getMenuInflater().inflate(R.menu.activity_osvetlenie, menu);
return true;
}
public boolean onOptionsItemSelected(MenuItem item) {
switch (item.getItemId()) {
case android.R.id.home:
NavUtils.navigateUpFromSameTask(this);
return true;
}
return super.onOptionsItemSelected(item);
}
public class SpinnerActivity extends Activity implements OnItemSelectedListener {
String miest;
public void onItemSelected(AdapterView<?> parent, View view,
int pos, long id) {
miest=parent.getItemAtPosition(pos).toString();
}
public void onNothingSelected(AdapterView<?> parent) {
// Another interface callback
}
public void osvZap(View view) {
DBAdapter db = new DBAdapter(this);
db.open();
long id;
id = db.insertTitle(
"cas",
"PI",
miest, "ON");
System.out.println(miest);
db.close();
}
}
}
任何人有一個想法，我做了什麼錯？謝謝。
謝謝veryyyyyy muchhhhh :) – 2013-03-01 21:30:03
當你用答案解決了問題，你應該檢查左邊最能幫助你標記答案的檢查。 – wtsang02 2013-03-01 21:33:59