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为什么我的应用程序在启动时崩溃 (Android Studio)

[英]Why my app crashes on startup (Android Studio)

 原文  2016-04-30 14:43:51  5   1    android/ android-layout

问题描述

我正在 Android Studio IDE 1.1.0 版上开发应用程序。 这是一个百分比应用程序...

我的问题是当我在设备上启动应用程序时，它在启动时一直崩溃。

这是我的 AndroidManifest.xml

<?xml version="1.0" encoding="utf-8"?>


<application
    android:allowBackup="true"
    android:icon="@mipmap/ic_launcher"
    android:label="@string/app_name"
    android:theme="@style/AppTheme" >
    <activity
        android:name=".MainActivity"
        android:label="@string/app_name" >
        <intent-filter>
            <action android:name="android.intent.action.MAIN" />

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

主活动.java

package com.ziad_homework.myapplication;

import android.app.Activity;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;


public class MainActivity extends Activity {

TextView totalTextView;
EditText percentageTxt;
EditText numberTxt;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    totalTextView = (TextView) findViewById(R.id.totalTextView);
    percentageTxt = (EditText) findViewById(R.id.percentageTxt);
    numberTxt = (EditText) findViewById(R.id.numTxt);

    Button calcBtn = (Button) findViewById(R.id.calcBtn);
    calcBtn.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View view)
        {
            float percentage = Float.parseFloat(percentageTxt.getText().toString());
            float dec = percentage / 100;
            float total = dec * Float.parseFloat(numberTxt.getText().toString());
            totalTextView.setText(Float.toString(total));
        }
    });
}


@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);
}
}

活动_main.xml

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools" android:layout_width="wrap_content"
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">


<TextView
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    android:text="0"
    android:id="@+id/totalTextView"
    android:layout_marginTop="29dp"
    android:textStyle="normal"
    android:layout_alignParentTop="true"
    android:layout_alignParentEnd="true"
    android:layout_alignParentStart="true"
    android:layout_alignParentBottom="false"
    android:layout_alignParentLeft="false"
    android:layout_alignWithParentIfMissing="false"
    android:layout_alignParentRight="false"
    android:autoText="false"
    android:elegantTextHeight="false"
    android:gravity="center"
    android:textAlignment="center"
    android:textSize="50dp" />

<TextView
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:textAppearance="?android:attr/textAppearanceLarge"
    android:text="What is"
    android:id="@+id/textView"
    android:layout_below="@+id/totalTextView"
    android:layout_centerHorizontal="true"
    android:layout_marginTop="35dp" />

<EditText
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:inputType="numberDecimal"
    android:ems="10"
    android:id="@+id/percentageTxt"
    android:layout_marginTop="28dp"
    android:hint="Enter Percentage"
    android:textAlignment="center"
    android:gravity="center"
    android:layout_below="@+id/textView"
    android:layout_centerHorizontal="true" />

<EditText
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:inputType="numberDecimal"
    android:ems="10"
    android:id="@+id/numTxt"
    android:hint="Enter Number"
    android:textAlignment="center"
    android:gravity="center"
    android:layout_marginTop="18dp"
    android:layout_below="@+id/textView3"
    android:layout_toStartOf="@+id/textView2" />

<TextView
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:textAppearance="?android:attr/textAppearanceLarge"
    android:text="%"
    android:id="@+id/textView2"
    android:layout_alignBottom="@+id/percentageTxt"
    android:layout_alignEnd="@+id/totalTextView"
    android:layout_marginEnd="25dp"
    android:layout_marginRight="55dp"
    android:layout_marginBottom="5dp"
    android:textSize="30dp" />

<TextView
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:textAppearance="?android:attr/textAppearanceLarge"
    android:text="of"
    android:id="@+id/textView3"
    android:layout_centerVertical="true"
    android:layout_centerHorizontal="true" />

<Button
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:text="CALCULATE"
    android:id="@+id/calcBtn"
    android:layout_marginTop="39dp"
    android:background="#e8443e6f"
    android:textColor="#ffffff"
    android:gravity="center"
    android:layout_below="@+id/numTxt"
    android:layout_alignStart="@+id/numTxt"
    android:layout_alignEnd="@+id/numTxt" />
</RelativeLayout>

字符串.xml

<resources>
<string name="app_name">Percent Calculator</string>

<string name="hello_world">Hello world!</string>
<string name="action_settings">Settings</string>
</resources>

颜色文件

<?xml version="1.0" encoding="utf-8"?>
<resources>
<color name="primaryColor">#e8443e6f</color>
</resources>

样式.xml (v21)

<?xml version="1.0" encoding="utf-8"?>
<resources>
<style name="AppTheme" parent="android:Theme.Material.Light">
    <item name="android:colorPrimary">@color/primaryColor</item>
</style>

</resources>

日志猫：

     04-30 14:53:23.541  20522-20522/com.ziad_homework.myapplication E/Zygote﹕ MountEmulatedStorage()
    04-30 14:53:23.541  20522-20522/com.ziad_homework.myapplication E/Zygote﹕ v2
    04-30 14:53:23.541  20522-20522/com.ziad_homework.myapplication I/SELinux﹕ Function: selinux_compare_spd_ram , priority [2] , priority version is VE=SEPF_SM-J105F_5.1.1_0046
    04-30 14:53:23.541  20522-20522/com.ziad_homework.myapplication E/SELinux﹕ [DEBUG] get_category: variable seinfo: default sensitivity: NULL, cateogry: NULL
    04-30 14:53:23.541  20522-20522/com.ziad_homework.myapplication I/art﹕ Late-enabling -Xcheck:jni
    04-30 14:53:23.541  20522-20522/com.ziad_homework.myapplication E/art﹕ setrlimit(RLIMIT_CORE) failed for pid 20522: Operation not permitted
    04-30 14:53:23.541  20522-20522/com.ziad_homework.myapplication I/libpersona﹕ KNOX_SDCARD checking this for 10111
    04-30 14:53:23.541  20522-20522/com.ziad_homework.myapplication I/libpersona﹕ KNOX_SDCARD not a persona
    04-30 14:53:23.581  20522-20530/com.ziad_homework.myapplication E/art﹕ Failed sending reply to debugger: Broken pipe
    04-30 14:53:23.581  20522-20530/com.ziad_homework.myapplication I/art﹕ Debugger is no longer active
    04-30 14:53:23.611  20522-20522/com.ziad_homework.myapplication W/ResourcesManager﹕ getTopLevelResources: /data/app/com.ziad_homework.myapplication-2/base.apk / 1.0 running in com.ziad_homework.myapplication rsrc of package null
    04-30 14:53:23.641  20522-20522/com.ziad_homework.myapplication W/ResourcesManager﹕ getTopLevelResources: /data/app/com.ziad_homework.myapplication-2/base.apk / 1.0 running in com.ziad_homework.myapplication rsrc of package null
    04-30 14:53:23.651  20522-20522/com.ziad_homework.myapplication W/ResourcesManager﹕ getTopLevelResources: /data/app/com.ziad_homework.myapplication-2/base.apk / 1.0 running in com.ziad_homework.myapplication rsrc of package null
    04-30 14:53:23.661  20522-20522/com.ziad_homework.myapplication D/AndroidRuntime﹕ Shutting down VM
    04-30 14:53:23.661  20522-20522/com.ziad_homework.myapplication E/AndroidRuntime﹕ FATAL EXCEPTION: main
        Process: com.ziad_homework.myapplication, PID: 20522
        java.lang.RuntimeException: Unable to start activity ComponentInfo{com.ziad_homework.myapplication/com.ziad_homework.myapplication.MainActivity}: java.lang.RuntimeException: A TaskDescription's primary color should be opaque
                at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:3150)
                at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:3260)
                at android.app.ActivityThread.access$1000(ActivityThread.java:218)
                at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1734)
                at android.os.Handler.dispatchMessage(Handler.java:102)
                at android.os.Looper.loop(Looper.java:145)
                at android.app.ActivityThread.main(ActivityThread.java:6934)
                at java.lang.reflect.Method.invoke(Native Method)
                at java.lang.reflect.Method.invoke(Method.java:372)
                at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1404)
                at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1199)
         Caused by: java.lang.RuntimeException: A TaskDescription's primary color should be opaque
                at android.app.ActivityManager$TaskDescription.<init>(ActivityManager.java:592)
                at android.app.Activity.onApplyThemeResource(Activity.java:4050)
                at 
android.view.ContextThemeWrapper.initializeTheme(ContextThemeWrapper.java:140)
                at android.view.ContextThemeWrapper.setTheme(ContextThemeWrapper.java:85)
                at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:3096)
                at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:3260)
                at android.app.ActivityThread.access$1000(ActivityThread.java:218)
                at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1734)
                at android.os.Handler.dispatchMessage(Handler.java:102)
                at android.os.Looper.loop(Looper.java:145)
                at android.app.ActivityThread.main(ActivityThread.java:6934)
                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:1404)
                at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1199)
    04-30 14:58:23.744  20522-20522/com.ziad_homework.myapplication I/Process﹕ Sending signal. PID: 20522 SIG: 9

1 个解决方案

解决方案1
 1  2016-04-30 14:55:52

您选择了一种半透明颜色（alpha 通道为e8 ）。 这通常是有风险的，因为您不知道这背后可能是什么颜色，因为它会因设备而异。 而且，鉴于您的错误消息，显然 Android 本身并不喜欢这样。 将其更改为ff ，使整体颜色为ff443e6f ，然后看看是否能解决您的问题。

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