新的android开发 - 不能开始一个新的活动

时间:2012-11-30 10:43:21

标签: android android-intent

首先 - 抱歉,如果我的问题有点愚蠢,我对Android开发完全不熟悉......

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,但每次我点击“下一步”按钮(应该开始我的第二个活动),我都会收到错误消息说:“不幸的是,Omis挂人已停止”,然后关闭应用程序...... 另外,当我在模拟器中重新启动相同的应用程序而不从Eclipse重新安装它时,它甚至没有向我显示第一个屏幕......

我甚至不知道我的问题在哪里,所以我附上了5个代码:

1'st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>

1'st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;
}

}

2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;
}

}

2'nd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。清单

<?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!)---我只想要这个代码可以工作。

4 个答案:

答案 0 :(得分:4)

问题可能出在意图中。试试这个:

Intent gameIntent = new Intent(OpenActivity.this, GameActivity.class);

答案 1 :(得分:2)

请从OpenActivity中删除finish();方法中的onPause(),然后从GameActivity中删除gvGrid.addView(tt);,因为gridview不是容器布局,而是写在代码下面

Intent gameIntent = new Intent(OpenActivity.this, GameActivity.class);
startActivity(gameIntent);

而不是

Intent gameIntent = new    Intent("com.omi.hangmanfree.GAMEACTIVITY");
startActivity(gameIntent);

它将解决您的问题。

答案 2 :(得分:0)

请在openActivity中替换

Intent gameIntent  = new Intent(getApplicationContext(), GameActivity.class);
startActivity(gameIntent);

答案 3 :(得分:0)

尝试更改此处:

           Intent gameIntent = new    Intent("com.omi.hangmanfree.GAMEACTIVITY");
            startActivity(gameIntent);

                Intent gameIntent = new    Intent(OpenActivity.this, GameActivity.class);
                startActivity(gameIntent);