1
制作了百分比计算器，但它不会显示在模拟器中，并且在启动前它只是说“不幸的是，停止“ 有人可以告诉我这里做错了什么吗？Android Studio：应用程序无法在模拟器中启动“不幸的是，应用程序已停止”
Java代码：
import android.support.v7.app.ActionBarActivity;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.EditText;
import android.widget.TextView;
public class MainActivity extends ActionBarActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
}
public void ButtonClick(View v)
{
EditText a = (EditText) findViewById(R.id.amount);
EditText p = (EditText) findViewById(R.id.percent);
TextView r = (TextView) findViewById(R.id.result);
double num1, num2, ans;
num1 = Double.parseDouble(a.getText().toString());
num2 = Double.parseDouble(p.getText().toString());
ans = 0;
if (v.getId() == R.id.bt1)
ans = num1 * num2/100;
if (v.getId() == R.id.bt2)
ans = (num1 * num2/100) + num1;
if (v.getId() == R.id.bt3)
ans = (num1 * num2/100) - num1;
r.setText(ans + "");
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.menu_main, menu);
return true;
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
int id = item.getItemId();
//noinspection SimplifiableIfStatement
if (id == R.id.action_settings) {
return true;
}
return super.onOptionsItemSelected(item);
}
}
XML：
<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" android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
android:paddingBottom="@dimen/activity_vertical_margin"
tools:context=".MainActivity"
android:background="@drawable/perccal2">
<ImageButton
android:layout_width="110dp"
android:layout_height="70dp"
android:id="@+id/bt1"
android:layout_marginTop="260dp"
android:background="@drawable/bt1"
android:onClick="ButtonClick" />
<ImageButton
android:layout_width="110dp"
android:layout_height="70dp"
android:id="@+id/bt2"
android:layout_marginTop="260dp"
android:layout_marginLeft="120dp"
android:background="@drawable/bt2"
android:onClick="ButtonClick" />
<ImageButton
android:layout_width="110dp"
android:layout_height="70dp"
android:id="@+id/bt3"
android:layout_marginTop="260dp"
android:layout_marginLeft="240dp"
android:background="@drawable/bt3"
android:onClick="ButtonClick" />
<EditText
android:layout_width="110dp"
android:layout_height="50dp"
android:id="@+id/amount"
android:layout_marginTop="50dp"
android:layout_marginLeft="210dp" />
<EditText
android:layout_width="80dp"
android:layout_height="50dp"
android:id="@+id/percent"
android:layout_marginTop="170dp"
android:layout_marginLeft="247dp"
/>
<TextView
android:layout_width="165dp"
android:layout_height="70dp"
android:id="@+id/result"
android:layout_marginTop="420dp"
android:layout_marginLeft="95dp"
/>
的logcat：
05-02 13:50:26.690 2300-2300/? E/art﹕ Throwing OutOfMemoryError
"Failed to allocate a 138883260 byte allocation with 1048576
free bytes and 63MB until OOM"
05-02 13:50:26.691 2300-2300/? D/skia﹕ ---
allocation failed for scaled bitmap
05-02 13:50:26.694 2300-2300/? D/AndroidRuntime﹕ Shutting down VM
--------- beginning of crash
05-02 13:50:26.717 2300-2300/? E/AndroidRuntime﹕ FATAL EXCEPTION: main
Process: com.bluewhale.percentagecalculator, PID: 2300
java.lang.RuntimeException: Unable to start activity
ComponentInfo{com.bluewhale.percentagecalculator/
com.bluewhale.percentagecalculator.MainActivity}:
android.view.InflateException: Binary XML file line #1:
Error inflating class android.widget.RelativeLayout
at
android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2298)
at
android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2360)
at android.app.ActivityThread.access$800(ActivityThread.java:144)
at
android.app.ActivityThread$H.handleMessage(ActivityThread.java:1278)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:135)
at android.app.ActivityThread.main(ActivityThread.java:5221)
at java.lang.reflect.Method.invoke(Native Method)
at java.lang.reflect.Method.invoke(Method.java:372)
at
com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run
(ZygoteInit.java:899)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:694)
Caused by: android.view.InflateException: Binary XML file line #1: Error
inflating class android.widget.RelativeLayout
at android.view.LayoutInflater.createView(LayoutInflater.java:633)
at
com.android.internal.policy.impl.PhoneLayoutInflater.onCreateView
(PhoneLayoutInflater.java:55)
at android.view.LayoutInflater.onCreateView(LayoutInflater.java:682)
at
android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:741)
at android.view.LayoutInflater.inflate(LayoutInflater.java:482)
at android.view.LayoutInflater.inflate(LayoutInflater.java:414)
at android.view.LayoutInflater.inflate(LayoutInflater.java:365)
at android.support.v7.app.AppCompatDelegateImplV7.setContentView
(AppCompatDelegateImplV7.java:249)
at android.support.v7.app.AppCompatActivity.setContentView
(AppCompatActivity.java:106)
at com.bluewhale.percentagecalculator.MainActivity.onCreate
(MainActivity.java:17)
at android.app.Activity.performCreate(Activity.java:5937)
at
android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1105)
at
android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2251)
android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2360)
at android.app.ActivityThread.access$800(ActivityThread.java:144)
at
android.app.ActivityThread$H.handleMessage(ActivityThread.java:1278)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:135)
at android.app.ActivityThread.main(ActivityThread.java:5221)
at java.lang.reflect.Method.invoke(Native Method)
at java.lang.reflect.Method.invoke(Method.java:372)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run
(ZygoteInit.java:899)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:694)
Caused by: java.lang.reflect.InvocationTargetException
at java.lang.reflect.Constructor.newInstance(Native Method)
at java.lang.reflect.Constructor.newInstance
(Constructor.java:288)
at
android.view.LayoutInflater.createView(LayoutInflater.java:607)
at com.android.internal.policy.impl.PhoneLayoutInflater.onCreateView
(PhoneLayoutInflater.java:55)
at android.view.LayoutInflater.onCreateView(LayoutInflater.java:682)
at
android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:741)
at android.view.LayoutInflater.inflate(LayoutInflater.java:482)
at android.view.LayoutInflater.inflate(LayoutInflater.java:414)
at android.view.LayoutInflater.inflate(LayoutInflater.java:365)
at android.support.v7.app.AppCompatDelegateImplV7.setContentView
(AppCompatDelegateImplV7.java:249)
at android.support.v7.app.AppCompatActivity.setContentView
(AppCompatActivity.java:106)
at com.bluewhale.percentagecalculator.MainActivity.onCreate
(MainActivity.java:17)
at android.app.Activity.performCreate(Activity.java:5937)
at
android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1105)
at
android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2251)
at
android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2360)
at android.app.ActivityThread.access$800(ActivityThread.java:144)
at
android.app.ActivityThread$H.handleMessage(ActivityThread.java:1278)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:135)
at android.app.ActivityThread.main(ActivityThread.java:5221)
at java.lang.reflect.Method.invoke(Native Method)
at java.lang.reflect.Method.invoke(Method.java:372)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run
(ZygoteInit.java:899)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:694)
Caused by: java.lang.OutOfMemoryError: Failed to allocate a 138883260
byte allocation with 1048576 free bytes and 63MB until OOM
at dalvik.system.VMRuntime.newNonMovableArray(Native Method)
at android.graphics.BitmapFactory.nativeDecodeAsset(Native Method)
at
android.graphics.BitmapFactory.decodeStream(BitmapFactory.java:609)
at
android.graphics.BitmapFactory.decodeResourceStream(BitmapFactory.java:444)
at
android.graphics.drawable.Drawable.createFromResourceStream
(Drawable.java:973)
at
android.content.res.Resources.loadDrawableForCookie(Resources.java:2423)
at android.content.res.Resources.loadDrawable(Resources.java:2330)
at android.content.res.TypedArray.getDrawable(TypedArray.java:749)
at android.view.View.<init>(View.java:3730)
at android.view.ViewGroup.<init>(ViewGroup.java:491)
at android.widget.RelativeLayout.<init>(RelativeLayout.java:248)
at android.widget.RelativeLayout.<init>(RelativeLayout.java:244)
at android.widget.RelativeLayout.<init>(RelativeLayout.java:240)
at java.lang.reflect.Constructor.newInstance(Native Method)
at java.lang.reflect.Constructor.newInstance(Constructor.java:288)
at android.view.LayoutInflater.createView(LayoutInflater.java:607)
at com.android.internal.policy.impl.PhoneLayoutInflater.onCreateView
(PhoneLayoutInflater.java:55)
at android.view.LayoutInflater.onCreateView(LayoutInflater.java:682)
at
android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:741)
at android.view.LayoutInflater.inflate(LayoutInflater.java:482)
at android.view.LayoutInflater.inflate(LayoutInflater.java:414)
at android.view.LayoutInflater.inflate(LayoutInflater.java:365)
at android.support.v7.app.AppCompatDelegateImplV7.setContentView
(AppCompatDelegateImplV7.java:249)
at android.support.v7.app.AppCompatActivity.setContentView
(AppCompatActivity.java:106)
at
com.bluewhale.percentagecalculator.MainActivity.onCreate
(MainActivity.java:17)
at android.app.Activity.performCreate(Activity.java:5937)
at android.app.Instrumentation.callActivityOnCreate
(Instrumentation.java:1105)
at android.app.ActivityThread.performLaunchActivity
(ActivityThread.java:2251)
at android.app.ActivityThread.handleLaunchActivity
(ActivityThread.java:2360)
at android.app.ActivityThread.access$800
(ActivityThread.java:144)
at
android.app.ActivityThread$H.handleMessage(ActivityThread.java:1278)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:135)
at android.app.ActivityThread.main(ActivityThread.java:5221)
at java.lang.reflect.Method.invoke(Native Method)
at java.lang.reflect.Method.invoke(Method.java:372)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run
(ZygoteInit.java:899)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:694)
05-02 13:50:26.728 1241-1289/? W/ActivityManager﹕
Force finishing activity com.bluewhale.percentagecalculator/.MainActivity
预先感谢您！
您是否正确地关闭了XML文件中的RelativeLayout标签？因为从我在这里看到它没有正确关闭。在文件末尾使用。或者它只是一个复制粘贴错误？ – Jerry