为什么点击不起作用呢?

[Gemerl]

Activity

public class MPlayerActivity extends Activity {
	private Button playButton;//播放按钮
	private Button restButton;//重播按钮
	private Button break_Button;//停止按钮
	private Button outButton;//退出按钮
	private EditText text;
	private String path;
    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        playButton=(Button)findViewById(R.id.play);
        playButton.setOnClickListener(new OnClickListener() {
        	public void onClick(View v) {
        		Toast.makeText(getApplicationContext(), "你点击了播放按钮!!", Toast.LENGTH_LONG);
        		System.out.println("你点击了播放按钮!!");
        	}
        });

R

public static final class drawable {
        public static final int ic_launcher=0x7f020000;
    }
    public static final class id {
        public static final int break_=0x7f050004;
        public static final int editText1=0x7f050000;
        public static final int linearLayout1=0x7f050001;
        public static final int linearLayout2=0x7f050002;
        public static final int out=0x7f050006;
        public static final int play=0x7f050003;
        public static final int rest=0x7f050005;
    }
    public static final class layout {
        public static final int main=0x7f030000;
    }
    public static final class string {
        public static final int app_name=0x7f040001;
        public static final int hello=0x7f040000;
    }

main.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:orientation="vertical" >

    <TextView
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:textColor="#FFFFFF"
        android:text="请输入要聆听的歌曲" />

    <EditText
        android:id="@+id/editText1"
        android:layout_width="match_parent"
        android:layout_height="wrap_content" >
        <requestFocus />
    </EditText>
    <TextView
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:textColor="#FFFFFF"
        android:text="歌曲列表" />
 	<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
	    android:layout_width="fill_parent"
	    android:layout_height="300px"
	    android:orientation="vertical" 
 	    android:id="@+id/linearLayout1"
 	    >
 	    
 	</LinearLayout>
 	
    <LinearLayout
        android:id="@+id/linearLayout2"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
		android:layout_marginTop="10px"
        >

        <Button
            android:id="@+id/play"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="播放" />

        <Button
            android:id="@+id/break_"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="暂停" />

        <Button
            android:id="@+id/rest"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="重播" />

        <Button
            android:id="@+id/out"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="退出" />

    </LinearLayout>

</LinearLayout>

public class MPlayerActivity extends Activity {
	private Button playButton;//播放按钮
	private Button restButton;//重播按钮
	private Button break_Button;//停止按钮
	private Button outButton;//退出按钮
	private EditText text;
	private String path;
    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        playButton=(Button)findViewById(R.id.play);
        playButton.setOnClickListener(new OnClickListener() {
        	public void onClick(View v) {
        		Toast.makeText(getApplicationContext(), "你点击了播放按钮!!", Toast.LENGTH_LONG);
        		System.out.println("你点击了播放按钮!!");
        	}
        });

R

public static final class drawable {
        public static final int ic_launcher=0x7f020000;
    }
    public static final class id {
        public static final int break_=0x7f050004;
        public static final int editText1=0x7f050000;
        public static final int linearLayout1=0x7f050001;
        public static final int linearLayout2=0x7f050002;
        public static final int out=0x7f050006;
        public static final int play=0x7f050003;
        public static final int rest=0x7f050005;
    }
    public static final class layout {
        public static final int main=0x7f030000;
    }
    public static final class string {
        public static final int app_name=0x7f040001;
        public static final int hello=0x7f040000;
    }

main.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:orientation="vertical" >

    <TextView
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:textColor="#FFFFFF"
        android:text="请输入要聆听的歌曲" />

    <EditText
        android:id="@+id/editText1"
        android:layout_width="match_parent"
        android:layout_height="wrap_content" >
        <requestFocus />
    </EditText>
    <TextView
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:textColor="#FFFFFF"
        android:text="歌曲列表" />
 	<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
	    android:layout_width="fill_parent"
	    android:layout_height="300px"
	    android:orientation="vertical" 
 	    android:id="@+id/linearLayout1"
 	    >
 	    
 	</LinearLayout>
 	
    <LinearLayout
        android:id="@+id/linearLayout2"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
		android:layout_marginTop="10px"
        >

        <Button
            android:id="@+id/play"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="播放" />

        <Button
            android:id="@+id/break_"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"

清单文件

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.mymp3"
    android:versionCode="1"
    android:versionName="1.0" >

    <uses-sdk android:minSdkVersion="8" />

    <application
        android:icon="@drawable/ic_launcher"
        android:label="@string/app_name" >
        <activity
            android:label="@string/app_name"
            android:name=".MPlayerActivity" >
            <intent-filter >
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
    </application>
	
</manifest>

[何呵和喝]

System.out.println("你点击了播放按钮!!"); 这句话没效果吗？

[LichKingSZ]

Toast.makeText(getApplicationContext(), "你点击了播放按钮!!", Toast.LENGTH_LONG).show();

[Gemerl]

引用 1 楼 u012088724 的回复:

System.out.println("你点击了播放按钮!!"); 这句话没效果吗？

没有打印的...

[Gemerl]

引用 2 楼 sinom 的回复:

Toast.makeText(getApplicationContext(), "你点击了播放按钮!!", Toast.LENGTH_LONG).show();

确实没有写 show(); 新手来的...