在我的应用程序中。当用户按下按钮(下一个),然后获取secondAc。在此活动中,我想检查edittext中的数据,如果不为null,它将转到saveFile保存文件。然后应用程序关闭并打开agian时用户留在secondAc我想检查onResume查找文件,如果它有我想得到它并祝酒他们 但我有错误告诉“无法开始活动”
这是我在mainActivity中的代码
package com.example.prtest;
import android.app.Activity;
public class MainActivity extends Activity {
private Button bth;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Button bth = (Button)findViewById(R.id.next);
bth.setOnClickListener(new View.OnClickListener(){
@Override
public void onClick(View v) {
Intent i = new Intent(MainActivity.this, secondAc.class);
startActivity(i);
}
});
}
@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;
}
}
这是我在secondAc中的代码
package com.example.prtest;
import android.app.Activity;
public class secondAc extends Activity {
private SharedPreferences spf;
private EditText edit;
@Override
protected void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
setContentView(R.id.layout2);
edit = (EditText)findViewById(R.id.edit);
}
@Override
protected void onResume() {
// TODO Auto-generated method stub
super.onResume();
getFile();
}
@Override
protected void onPause() {
// TODO Auto-generated method stub
super.onPause();
String data = edit.getText().toString();
if(data != null){
saveFile(data);
}
}
protected void saveFile(String data){
spf = this.getSharedPreferences("info", MODE_PRIVATE);
SharedPreferences.Editor editor = spf.edit();
editor.putString("data", data);
editor.clear();
editor.commit();
}
protected void getFile(){
spf = this.getSharedPreferences("info", MODE_PRIVATE);
String getData = spf.getString("data", null);
if(getData != null){
Toast.makeText(getApplicationContext(), "mee", Toast.LENGTH_SHORT).show();
}else{
Toast.makeText(getApplicationContext(), "maimee", Toast.LENGTH_SHORT).show();
}
}
}
这是我的logcat错误
11-17 13:12:42.193: E/AndroidRuntime(1166): FATAL EXCEPTION: main
11-17 13:12:42.193: E/AndroidRuntime(1166): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.prtest/com.example.prtest.secondAc}: android.content.res.Resources$NotFoundException: Resource ID #0x7f080002 type #0x12 is not valid
11-17 13:12:42.193: E/AndroidRuntime(1166): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1955)
11-17 13:12:42.193: E/AndroidRuntime(1166): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1980)
11-17 13:12:42.193: E/AndroidRuntime(1166): at android.app.ActivityThread.access$600(ActivityThread.java:122)
11-17 13:12:42.193: E/AndroidRuntime(1166): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1146)
11-17 13:12:42.193: E/AndroidRuntime(1166): at android.os.Handler.dispatchMessage(Handler.java:99)
11-17 13:12:42.193: E/AndroidRuntime(1166): at android.os.Looper.loop(Looper.java:137)
11-17 13:12:42.193: E/AndroidRuntime(1166): at android.app.ActivityThread.main(ActivityThread.java:4340)
11-17 13:12:42.193: E/AndroidRuntime(1166): at java.lang.reflect.Method.invokeNative(Native Method)
11-17 13:12:42.193: E/AndroidRuntime(1166): at java.lang.reflect.Method.invoke(Method.java:511)
11-17 13:12:42.193: E/AndroidRuntime(1166): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:784)
11-17 13:12:42.193: E/AndroidRuntime(1166): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:551)
11-17 13:12:42.193: E/AndroidRuntime(1166): at dalvik.system.NativeStart.main(Native Method)
11-17 13:12:42.193: E/AndroidRuntime(1166): Caused by: android.content.res.Resources$NotFoundException: Resource ID #0x7f080002 type #0x12 is not valid
11-17 13:12:42.193: E/AndroidRuntime(1166): at android.content.res.Resources.loadXmlResourceParser(Resources.java:2112)
11-17 13:12:42.193: E/AndroidRuntime(1166): at android.content.res.Resources.getLayout(Resources.java:858)
11-17 13:12:42.193: E/AndroidRuntime(1166): at android.view.LayoutInflater.inflate(LayoutInflater.java:394)
11-17 13:12:42.193: E/AndroidRuntime(1166): at android.view.LayoutInflater.inflate(LayoutInflater.java:352)
11-17 13:12:42.193: E/AndroidRuntime(1166): at com.android.internal.policy.impl.PhoneWindow.setContentView(PhoneWindow.java:251)
11-17 13:12:42.193: E/AndroidRuntime(1166): at android.app.Activity.setContentView(Activity.java:1835)
11-17 13:12:42.193: E/AndroidRuntime(1166): at com.example.prtest.secondAc.onCreate(secondAc.java:19)
11-17 13:12:42.193: E/AndroidRuntime(1166): at android.app.Activity.performCreate(Activity.java:4465)
11-17 13:12:42.193: E/AndroidRuntime(1166): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1049)
11-17 13:12:42.193: E/AndroidRuntime(1166): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1919)
11-17 13:12:42.193: E/AndroidRuntime(1166): ... 11 more
谢谢
答案 0 :(得分:0)
您想要setContentView(R.id.layout2);
而不是setContentView(R.layout.layout2);
吗?