最近，我开始开发android应用程序，在模拟器中编译应用程序时，该过程终止了。
LogCat：
05-10 17:55:21.539: D/AndroidRuntime(4293): Shutting down VM
05-10 17:55:21.539: W/dalvikvm(4293): threadid=1: thread exiting with uncaught exception (group=0x40020578)
05-10 17:55:21.562: E/AndroidRuntime(4293): FATAL EXCEPTION: main
05-10 17:55:21.562: E/AndroidRuntime(4293): java.lang.RuntimeException: Unable to instantiate activity ComponentInfo{br.me.example.clientes/br.me.example.clientes.Principal}: java.lang.ClassNotFoundException: br.me.example.clientes.Principal in loader dalvik.system.PathClassLoader[/data/app/br.me.example.clientes-2.apk]
05-10 17:55:21.562: E/AndroidRuntime(4293): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1573)
05-10 17:55:21.562: E/AndroidRuntime(4293): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1667)
05-10 17:55:21.562: E/AndroidRuntime(4293): at android.app.ActivityThread.access$1500(ActivityThread.java:117)
05-10 17:55:21.562: E/AndroidRuntime(4293): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:935)
05-10 17:55:21.562: E/AndroidRuntime(4293): at android.os.Handler.dispatchMessage(Handler.java:99)
05-10 17:55:21.562: E/AndroidRuntime(4293): at android.os.Looper.loop(Looper.java:130)
05-10 17:55:21.562: E/AndroidRuntime(4293): at android.app.ActivityThread.main(ActivityThread.java:3687)
05-10 17:55:21.562: E/AndroidRuntime(4293): at java.lang.reflect.Method.invokeNative(Native Method)
05-10 17:55:21.562: E/AndroidRuntime(4293): at java.lang.reflect.Method.invoke(Method.java:507)
05-10 17:55:21.562: E/AndroidRuntime(4293): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:867)
05-10 17:55:21.562: E/AndroidRuntime(4293): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:625)
05-10 17:55:21.562: E/AndroidRuntime(4293): at dalvik.system.NativeStart.main(Native Method)
05-10 17:55:21.562: E/AndroidRuntime(4293): Caused by: java.lang.ClassNotFoundException: br.me.example.clientes.Principal in loader dalvik.system.PathClassLoader[/data/app/br.me.example.clientes-2.apk]
05-10 17:55:21.562: E/AndroidRuntime(4293): at dalvik.system.PathClassLoader.findClass(PathClassLoader.java:240)
05-10 17:55:21.562: E/AndroidRuntime(4293): at java.lang.ClassLoader.loadClass(ClassLoader.java:551)
05-10 17:55:21.562: E/AndroidRuntime(4293): at java.lang.ClassLoader.loadClass(ClassLoader.java:511)
05-10 17:55:21.562: E/AndroidRuntime(4293): at android.app.Instrumentation.newActivity(Instrumentation.java:1021)
05-10 17:55:21.562: E/AndroidRuntime(4293): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1565)
05-10 17:55:21.562: E/AndroidRuntime(4293): ... 11 more
班长
package br.me.clientes;
import br.me.example.clientes.R;
import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
public class Principal extends Activity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.principal);
Button btnCadastro = (Button) findViewById(R.id.btnCadastro);
Button btnListar = (Button) findViewById(R.id.btnListar);
Button btnApagar = (Button) findViewById(R.id.btnApagar);
Button btnSair = (Button) findViewById(R.id.btnSair);
btnCadastro.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
startActivity(new Intent(getBaseContext(), Cadastro.class));
}
});
btnListar.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
startActivity(new Intent(getBaseContext(), Cadastro.class));
}
});
btnApagar.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
startActivity(new Intent(getBaseContext(), Cadastro.class));
}
});
btnSair.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
startActivity(new Intent(getBaseContext(), Cadastro.class));
}
});
}
}卡达斯特罗课程
package br.me.clientes;
import android.app.Activity;
import android.app.ProgressDialog;
import android.graphics.Color;
import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.Toast;
import br.me.example.clientes.R;
public class Cadastro extends Activity implements Runnable {
private ProgressDialog pd;
private String valor;
private EditText txtNome;
private EditText txtEmail;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.cadastro);
Button btnOk = (Button) findViewById(R.id.btnOk);
txtNome = (EditText) findViewById(R.id.txtNome);
txtEmail = (EditText) findViewById(R.id.txtEmail);
final EditText txtEndereco = (EditText) findViewById(R.id.txtEndereco);
final EditText txtNumero = (EditText) findViewById(R.id.txtNumero);
btnOk.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
pd = ProgressDialog.show(Cadastro.this, "Aguarde",
"Cadastrando informações", true, false);
Thread t = new Thread(Cadastro.this);
t.start();
}
});
}
@Override
public void run() {
// TODO Auto-generated method stub
valor = txtNome.getText().toString();
if (txtNome.getText().toString().equals(" ")) {
h2.sendEmptyMessage(0);
}
}
private Handler h = new Handler() {
@Override
public void handleMessage(Message msg) {
pd.dismiss();
Toast t = Toast.makeText(getBaseContext(), txtNome.getText(),
Toast.LENGTH_SHORT);
t.show();
}
};
private Handler h2 = new Handler() {
@Override
public void handleMessage(Message msg) {
pd.dismiss();
Toast t = Toast.makeText(getBaseContext(), "Preencha o campo Nome",
Toast.LENGTH_SHORT);
t.show();
txtNome.setBackgroundColor(Color.RED);
}
};
}Android清单
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="br.me.example.clientes"
android:versionCode="1"
android:versionName="1.0" >
<uses-sdk
android:minSdkVersion="8"
android:targetSdkVersion="21" />
<application
android:allowBackup="true"
android:icon="@drawable/ic_launcher"
android:label="@string/app_name"
android:theme="@style/AppTheme" >
<activity
android:name=".Principal">
<intent-filter>
<action android:name="android.intent.action.MAIN"> </action>
<category android:name="android.intent.category.LAUNCHER"> </category>
</intent-filter>
</activity>
<activity android:name=".Cadastro"></activity>
</application>
</manifest>准备好。
如果您需要什么，请告诉我。
您的包裹名称有问题。在您中，Manifest您指定默认软件包为br.me.example.clientes。然后，通过指定您的班级.Principal，它将使用以下路径搜索班级br.me.example.clientes.Principal。
但是，正如我们在您的课堂上看到的那样Principal，他位于这里br.me.clientes.Principal。
尝试在Manifest或类中修复路径。
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