每当我尝试在模拟器中运行此应用程序时，它总是崩溃，我无法弄清楚原因！
P.S。我对Android应用程序开发很陌生，所以我可能已经犯了十几个错误，所以请理解！
logcat的：
06-29 01:16:30.719 392-406/system_process I/Choreographer﹕ Skipped 41 frames! The application may be doing too much work on its main thread.
06-29 01:16:30.889 1195-1195/com.trial.contactmanager I/Process﹕ Sending signal. PID: 1195 SIG: 9
06-29 01:16:30.929 392-436/system_process E/SoundPool﹕ error loading /system/media/audio/ui/Effect_Tick.ogg
06-29 01:16:30.929 392-436/system_process W/AudioService﹕ Soundpool could not load file: /system/media/audio/ui/Effect_Tick.ogg
06-29 01:16:30.929 392-436/system_process E/SoundPool﹕ error loading /system/media/audio/ui/Effect_Tick.ogg
06-29 01:16:30.929 392-436/system_process W/AudioService﹕ Soundpool could not load file: /system/media/audio/ui/Effect_Tick.ogg
06-29 01:16:30.929 392-436/system_process E/SoundPool﹕ error loading /system/media/audio/ui/Effect_Tick.ogg
06-29 01:16:30.929 392-436/system_process W/AudioService﹕ Soundpool could not load file: /system/media/audio/ui/Effect_Tick.ogg
06-29 01:16:30.929 392-436/system_process E/SoundPool﹕ error loading /system/media/audio/ui/Effect_Tick.ogg
06-29 01:16:30.929 392-436/system_process W/AudioService﹕ Soundpool could not load file: /system/media/audio/ui/Effect_Tick.ogg
06-29 01:16:30.939 392-436/system_process E/SoundPool﹕ error loading /system/media/audio/ui/Effect_Tick.ogg
06-29 01:16:30.939 392-436/system_process W/AudioService﹕ Soundpool could not load file: /system/media/audio/ui/Effect_Tick.ogg
06-29 01:16:30.939 392-436/system_process E/SoundPool﹕ error loading /system/media/audio/ui/KeypressStandard.ogg
06-29 01:16:30.939 392-436/system_process W/AudioService﹕ Soundpool could not load file: /system/media/audio/ui/KeypressStandard.ogg
06-29 01:16:30.939 392-436/system_process E/SoundPool﹕ error loading /system/media/audio/ui/KeypressSpacebar.ogg
06-29 01:16:30.939 392-436/system_process W/AudioService﹕ Soundpool could not load file: /system/media/audio/ui/KeypressSpacebar.ogg
06-29 01:16:30.939 392-436/system_process E/SoundPool﹕ error loading /system/media/audio/ui/KeypressDelete.ogg
06-29 01:16:30.939 392-436/system_process W/AudioService﹕ Soundpool could not load file: /system/media/audio/ui/KeypressDelete.ogg
06-29 01:16:30.939 392-436/system_process E/SoundPool﹕ error loading /system/media/audio/ui/KeypressReturn.ogg
06-29 01:16:30.949 392-436/system_process W/AudioService﹕ Soundpool could not load file: /system/media/audio/ui/KeypressReturn.ogg
06-29 01:16:30.949 392-436/system_process E/SoundPool﹕ error loading /system/media/audio/ui/KeypressInvalid.ogg
06-29 01:16:30.949 392-436/system_process W/AudioService﹕ Soundpool could not load file: /system/media/audio/ui/KeypressInvalid.ogg
06-29 01:16:30.949 392-436/system_process W/AudioService﹕ onLoadSoundEffects(), Error -1 while loading samples
06-29 01:16:31.109 392-407/system_process I/Choreographer﹕ Skipped 58 frames! The application may be doing too much work on its main thread.
06-29 01:16:31.489 392-614/system_process I/ActivityManager﹕ Process com.trial.contactmanager (pid 1195) has died.
06-29 01:16:31.559 392-404/system_process W/InputMethodManagerService﹕ Window already focused, ignoring focus gain of: com.android.internal.view.IInputMethodClient$Stub$Proxy@b420dad0 attribute=null, token = android.os.BinderProxy@b4023778
06-29 01:30:01.049 392-431/system_process D/ConnectivityService﹕ Sampling interval elapsed, updating statistics ..
06-29 01:30:01.059 392-431/system_process D/ConnectivityService﹕ Done.
06-29 01:30:01.079 392-431/system_process D/ConnectivityService﹕ Setting timer for 720seconds
这是我的代码：
package com.trial.contactmanager;
import android.app.Activity;
import android.app.ActionBar;
import android.app.Fragment;
import android.os.Bundle;
import android.text.Editable;
import android.text.TextWatcher;
import android.view.LayoutInflater;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.ViewGroup;
import android.os.Build;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TabHost;
public class MainActivity extends Activity {
EditText name, phone, email, address;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
if (savedInstanceState == null) {
getFragmentManager().beginTransaction()
.add(R.id.container, new PlaceholderFragment())
.commit();
}
name = (EditText) findViewById(R.id.name);
phone = (EditText) findViewById(R.id.phone);
email = (EditText) findViewById(R.id.email);
address = (EditText) findViewById(R.id.address);
final Button add_btn = (Button) findViewById(R.id.add_btn);
TabHost tabHost = (TabHost) findViewById(R.id.tabHost);
tabHost.setup();
TabHost.TabSpec tabSpec = tabHost.newTabSpec("creator");
tabSpec.setContent(R.id.tabCreate);
tabSpec.setIndicator("Creator");
tabHost.addTab(tabSpec);
tabSpec = tabHost.newTabSpec("list");
tabSpec.setContent(R.id.tabList);
tabSpec.setIndicator("List");
tabHost.addTab(tabSpec);
name.addTextChangedListener(new TextWatcher() {
@Override
public void beforeTextChanged(CharSequence charSequence, int i, int i2, int i3) {
}
@Override
public void onTextChanged(CharSequence charSequence, int i, int i2, int i3) {
add_btn.setEnabled(!name.getText().toString().trim().isEmpty());
}
@Override
public void afterTextChanged(Editable editable) {
}
});
}
@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;
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
int id = item.getItemId();
if (id == R.id.action_settings) {
return true;
}
return super.onOptionsItemSelected(item);
}
/**
* A placeholder fragment containing a simple view.
*/
public static class PlaceholderFragment extends Fragment {
public PlaceholderFragment() {
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View rootView = inflater.inflate(R.layout.fragment_main, container, false);
return rootView;
}
}
}