首先 - 对不起,如果我的问题有点愚蠢,我对 Android 开发完全陌生......
我正在尝试从我的“LAUNCHER”活动开始一个新活动并在模拟器上运行它,但是每次我单击“下一步”按钮(应该开始我的第二个活动)时,我都会收到一条错误消息:“不幸的是,Omis hang man free 已经停止”,然后关闭应用程序......另外,当我在模拟器中重新启动同一个应用程序而不从 Eclipse 重新安装它时,它甚至没有向我显示第一个屏幕。 ..
我什至不知道我的问题出在哪里,所以我附上了 5 个代码:
第一个活动布局(名为“activity_open”)
<?xml version="1.0" encoding="utf-8" ?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
tools:context=".OpenActivity"
android:background="#DCDCDC" >
<LinearLayout
android:layout_height="fill_parent"
android:layout_width="fill_parent"
android:gravity="center"
android:layout_weight="30" >
<TextView
android:id="@+id/tvEnterName"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:gravity="center"
android:text="@string/stEnterName"
android:textSize="24sp" />
</LinearLayout>
<LinearLayout
android:layout_height="fill_parent"
android:layout_width="fill_parent"
android:gravity="center"
android:layout_weight="40" >
<EditText
android:id="@+id/etNameInput"
android:layout_width="250dp"
android:layout_height="fill_parent"
android:background="#FFFFFF"
android:focusableInTouchMode="true"
android:gravity="center"
android:hint="@string/stHintNameEnter"
android:singleLine="true" />
</LinearLayout>
<LinearLayout
android:layout_height="fill_parent"
android:layout_width="fill_parent"
android:gravity="center"
android:layout_weight="30" >
<Button
android:id="@+id/bNext"
android:layout_width="75dp"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:text="@string/stNext"
android:textSize="24sp" />
</LinearLayout>
</LinearLayout>
第一个活动类(名为“OpenActivity”)
package com.omi.hangmanfree;
import android.os.Bundle;
import android.app.Activity;
import android.content.Intent;
import android.graphics.Color;
import android.view.Menu;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;
public class OpenActivity extends Activity {
TextView tvEnterYourName;
EditText etName;
Button bContinue;
String myName, tmp;
final String errorStr = "\nYou must enter a name!";
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_open);
initialize();
bContinue.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
myName = etName.getText().toString();
if(etName.getText().toString().equals("") == true)
{
tvEnterYourName.setText(tmp + errorStr);
tvEnterYourName.setTextColor(Color.RED);
}
else
{
try {
Intent gameIntent = new Intent("com.omi.hangmanfree.GAMEACTIVITY");
startActivity(gameIntent);
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
});
}
private void initialize() {
// TODO Auto-generated method stub
tvEnterYourName = (TextView)findViewById(R.id.tvEnterName);
etName = (EditText)findViewById(R.id.etNameInput);
bContinue = (Button)findViewById(R.id.bNext);
myName = "~";
tmp = tvEnterYourName.getText().toString();
}
@Override
protected void onPause() {
// TODO Auto-generated method stub
super.onPause();
finish();
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.activity_open, menu);
return true;
}
}
第二个活动类(名为“GameActivity”)包com.omi.hangmanfree;
import android.os.Bundle;
import android.app.Activity;
import android.view.Menu;
import android.widget.GridView;
import android.widget.TextView;
public class GameActivity extends Activity {
TextView tt;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_game);
GridView gvGrid = (GridView)findViewById(R.id.gvHagdara);
tt.setText("_");
gvGrid.addView(tt);
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.activity_game, menu);
return true;
}
}
第二个活动布局(名为“layout_game”)
<?xml version="1.0" encoding="utf-8" ?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".GameActivity" >
<TextView
android:id="@+id/textView1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerHorizontal="true"
android:layout_centerVertical="true"
android:text="@string/hello_world" />
<GridView
android:id="@+id/gvHagdara"
android:layout_width="match_parent"
android:layout_height="50dp"
android:layout_below="@+id/textView1"
android:layout_centerInParent="false"
android:numColumns="auto_fit" >
</GridView>
</RelativeLayout>
5. 表现
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.omi.hangmanfree"
android:versionCode="1"
android:versionName="1.0" >
<uses-sdk
android:minSdkVersion="8"
android:targetSdkVersion="17" />
<application
android:allowBackup="true"
android:icon="@drawable/ic_launcher"
android:label="@string/app_name"
android:theme="@style/AppTheme" >
<activity
android:name=".OpenActivity"
android:label="@string/app_name" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<activity android:name=".GameActivity"
android:label="@string/title_activity_game" >
<intent-filter>
<action android:name="com.omi.hangmanfree.GAMEACTIVITY" />
<category android:name="android.intent.category.DEFAULT" />
</intent-filter>
</activity>
</application>
</manifest>
我不是在寻找代码改进(我只是在学习语言),所以请不要向我发送改进代码的建议(我知道有很多!)---我只是希望这段代码能够工作。