私は数学のトリックを使用して人々の心を読む単純なアプリを作成しています（トリック）が、実行しようとすると停止してクラッシュし、ここで開始されないことが私の主な活動です
public class MainActivity extends Activity {
Button btnn;
Button btn;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setTheme(android.R.style.Theme_DeviceDefault);
setContentView(R.layout.activity_main);
btnn= (Button) findViewById(R.id.Start);
btn= (Button) findViewById(R.id.Exit);
btn.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
AlertDialog.Builder builder = new AlertDialog.Builder(MainActivity.this);
builder.setMessage("Are you sure you want to exit?");
// builder.setCancelable(false);
builder.setPositiveButton("Yes", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
// TODO Auto-generated method stub
MainActivity.this.finish();
}
});
builder.setNegativeButton("No", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
}
});
AlertDialog alert = builder.create();
alert.show();
}
});
btnn.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
Intent toNextPage = new Intent(MainActivity.this,
two.class);
startActivity(toNextPage);
MainActivity.this.finish();
}
});
}}
ここに私のxmlファイルがあります
<?xml version="1.0" encoding="utf-8"?>
<ScrollView xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent" >
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" >
<TextView
android:id="@+id/textView1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Welcome to Brain Reader"
android:textAppearance="?android:attr/textAppearanceLarge"
android:textStyle="bold"
android:layout_marginLeft="16dp"
android:typeface="serif" />
<TextView
android:id="@+id/textView2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textAppearance="?android:attr/textAppearanceMedium"
android:textStyle="bold"
android:textSize="22dp"
android:typeface="serif"/>
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="wrap_content" >
<ImageButton
android:id="@+id/Start"
android:layout_width="110dp"
android:layout_height="50dp"
android:layout_alignParentLeft="true"
android:layout_alignParentTop="true"
android:src="@drawable/ic_launche"
android:layout_marginLeft="10dp" />
<ImageButton
android:id="@+id/Exit"
android:layout_width="110dp"
android:layout_height="50dp"
android:layout_alignParentRight="true"
android:layout_alignParentTop="true"
android:src="@drawable/ex"
android:layout_marginRight="10dp" />
</RelativeLayout>
</LinearLayout>
誰でも助けてください事前に感謝します私のログの猫は言います
07-02 12:05:00.927: D/ThemeManager(18835): packageName=====com.example.brainreader
07-02 12:05:00.931: D/ThemeManager(18835): packageName=com.example.brainreader
07-02 12:05:01.043: E/AndroidRuntime(18835): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.brainreader/com.example.brainreader.MainActivity}: java.lang.ClassCastException: android.widget.ImageButton cannot be cast to android.widget.Button
07-02 12:05:01.043: E/AndroidRuntime(18835): at com.example.brainreader.MainActivity.onCreate(MainActivity.java:21)
07-02 12:05:01.047: W/ActivityManager(231): Force finishing activity com.example.brainreader/.MainActivity
07-02 12:05:01.163: D/AES(231): process : com.example.brainreader
07-02 12:05:01.163: D/AES(231): module : com.example.brainreader v1 (1.0)
07-02 12:05:01.165: D/AEE/LIBAEE(231): shell: raise_exp(2, 18835, -1361051648, com.example.brainreader, 0x0x213dd00, 0x0x0)
07-02 12:05:01.165: E/AEE/LIBAEE(231): read_cmdline:com.example.brainreader
07-02 12:05:01.577: W/ActivityManager(231): Activity pause timeout for ActivityRecord{41f62250 com.example.brainreader/.MainActivity}
07-02 12:05:01.577: V/ActivityManager(231): Enqueueing pending finish: ActivityRecord{41f62250 com.example.brainreader/.MainActivity}
07-02 12:05:01.689: I/InputDispatcher(231): channel '41480db8 Starting com.example.brainreader (server)' ~ abortBrokenDispatchCycle - notify=false
07-02 12:05:07.434: I/ActivityManager(231): Process com.example.brainreader (pid 18835) has died.
07-02 12:05:07.434: V/ActivityManager(231): Dying app: ProcessRecord{41c57800 18835:com.example.brainreader/10095}, pid: 18835, thread: android.os.BinderProxy@418da480
07-02 12:05:07.440: V/ActivityManager(231): Removing app ProcessRecord{41c57800 0:com.example.brainreader/10095} from list [ActivityRecord{4210c030 com.android.contacts/.DialtactsContactsEntryActivity}, ActivityRecord{41455818 com.android.phone/.InCallScreen}, ActivityRecord{41691d88 com.gionee.launcher/.GNLauncherActivity}] with 3 entries
07-02 12:05:07.440: V/ActivityManager(231): Removing app ProcessRecord{41c57800 0:com.example.brainreader/10095} from list [] with 0 entries
07-02 12:05:07.440: V/ActivityManager(231): Removing app ProcessRecord{41c57800 0:com.example.brainreader/10095} from list [] with 0 entries
07-02 12:05:07.440: V/ActivityManager(231): Removing app ProcessRecord{41c57800 0:com.example.brainreader/10095} from list [] with 0 entries
07-02 12:05:07.440: V/ActivityManager(231): Removing app ProcessRecord{41c57800 0:com.example.brainreader/10095} from list [] with 0 entries
07-02 12:05:11.654: W/ActivityManager(231): Activity destroy timeout for ActivityRecord{41f62250 com.example.brainreader/.MainActivity}