所以我正在编写一个应用程序，出于某种原因，当我尝试获取FrameLayout的高度时，我得到一个运行时异常。我在整个设计中使用了相当多的重量，所以我想仔细检查它们是我需要它们的高度。
这是我的主要活动：
package com.app.conekta;
import android.app.Activity;
import android.os.Bundle;
import android.view.Window;
import android.widget.Button;
import android.widget.FrameLayout;
import android.widget.Toast;
public class Conekta extends Activity {
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
requestWindowFeature(Window.FEATURE_NO_TITLE);
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
}
@Override
public void onStart() {
super.onStart();
FrameLayout fl1 = (FrameLayout) findViewById(R.id.headerFrameLayout);
//Button b=(Button) findViewById(R.id.searchButton);
Toast.makeText(Conekta.this, fl1.getHeight(), Toast.LENGTH_SHORT).show();
}
}
这是我的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" >
<FrameLayout
android:id="@+id/headerFrameLayout"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_weight="0.05"
android:background="#597eAA" >
<ImageView
android:id="@+id/logoImage"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:background="#7ba1d1"
android:src="@drawable/logo_conekta" />
</FrameLayout>
<LinearLayout
android:id="@+id/bodyLinearLayout"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_weight="0.7"
android:background="#f3f3f3"
android:orientation="horizontal" >
<FrameLayout
android:id="@+id/leftBlankFrameLayout"
android:layout_width="wrap_content"
android:layout_height="fill_parent"
android:layout_weight="0.15"
android:background="#f3f3f3" >
</FrameLayout>
<LinearLayout
android:id="@+id/centerVerticalLayout"
android:layout_width="wrap_content"
android:layout_height="fill_parent"
android:layout_weight="0.7"
android:orientation="vertical" >
<FrameLayout
android:id="@+id/topCenterFrameLayout"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_weight="0.35" >
</FrameLayout>
<TextView
android:id="@+id/venueLabel"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="0.025"
android:text="What are you looking for?"
android:textAppearance="?android:attr/textAppearanceMedium"
android:textColor="#000000" />
<EditText
android:id="@+id/venueTextField"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_weight="0.025" >
<requestFocus />
</EditText>
<FrameLayout
android:id="@+id/middleCenterFrameLayout"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_weight="0.05" >
</FrameLayout>
<TextView
android:id="@+id/locationLabel"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="0.025"
android:text="Where?"
android:textAppearance="?android:attr/textAppearanceMedium"
android:textColor="#000000" />
<AutoCompleteTextView
android:id="@+id/locationTextField"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_weight="0.025"
android:text="" />
<LinearLayout
android:id="@+id/buttonLinearLayout"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_weight="0.05"
android:background="#f3f3f3"
android:orientation="horizontal" >
<FrameLayout
android:id="@+id/leftButtonLinearLayout"
android:layout_width="wrap_content"
android:layout_height="fill_parent"
android:layout_weight="0.1" >
</FrameLayout>
<Button
android:id="@+id/searchButton"
android:layout_width="wrap_content"
android:layout_height="fill_parent"
android:layout_weight="0.8"
android:background="#6fa8dc"
android:text="Search" />
<FrameLayout
android:id="@+id/rightButtonLinearLayout"
android:layout_width="wrap_content"
android:layout_height="fill_parent"
android:layout_weight="0.1" >
</FrameLayout>
</LinearLayout>
<FrameLayout
android:id="@+id/bottomCenterFrameLayout"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_weight="0.35" >
</FrameLayout>
</LinearLayout>
<FrameLayout
android:id="@+id/rightBlankFrameLayout"
android:layout_width="wrap_content"
android:layout_height="fill_parent"
android:layout_weight="0.15"
android:background="#f3f3f3" >
</FrameLayout>
</LinearLayout>
<FrameLayout
android:id="@+id/footerFrameLayout"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_weight="0.15"
android:background="#7ba1d1" >
</FrameLayout>
</LinearLayout>
知道为什么会这样吗？
11-16 23:57:41.408: W/ResourceType(409): No package identifier when getting name for resource number 0x00000000
11-16 23:57:41.427: D/AndroidRuntime(409): Shutting down VM
11-16 23:57:41.427: W/dalvikvm(409): threadid=3: thread exiting with uncaught exception (group=0x4001b188)
11-16 23:57:41.427: E/AndroidRuntime(409): Uncaught handler: thread main exiting due to uncaught exception
11-16 23:57:41.447: E/AndroidRuntime(409): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.app.conekta/com.app.conekta.Conekta}: android.content.res.Resources$NotFoundException: String resource ID #0x0
11-16 23:57:41.447: E/AndroidRuntime(409): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2496)
11-16 23:57:41.447: E/AndroidRuntime(409): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2512)
11-16 23:57:41.447: E/AndroidRuntime(409): at android.app.ActivityThread.access$2200(ActivityThread.java:119)
11-16 23:57:41.447: E/AndroidRuntime(409): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1863)
11-16 23:57:41.447: E/AndroidRuntime(409): at android.os.Handler.dispatchMessage(Handler.java:99)
11-16 23:57:41.447: E/AndroidRuntime(409): at android.os.Looper.loop(Looper.java:123)
11-16 23:57:41.447: E/AndroidRuntime(409): at android.app.ActivityThread.main(ActivityThread.java:4363)
11-16 23:57:41.447: E/AndroidRuntime(409): at java.lang.reflect.Method.invokeNative(Native Method)
11-16 23:57:41.447: E/AndroidRuntime(409): at java.lang.reflect.Method.invoke(Method.java:521)
11-16 23:57:41.447: E/AndroidRuntime(409): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:860)
11-16 23:57:41.447: E/AndroidRuntime(409): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:618)
11-16 23:57:41.447: E/AndroidRuntime(409): at dalvik.system.NativeStart.main(Native Method)
11-16 23:57:41.447: E/AndroidRuntime(409): Caused by: android.content.res.Resources$NotFoundException: String resource ID #0x0
11-16 23:57:41.447: E/AndroidRuntime(409): at android.content.res.Resources.getText(Resources.java:200)
11-16 23:57:41.447: E/AndroidRuntime(409): at android.widget.Toast.makeText(Toast.java:258)
11-16 23:57:41.447: E/AndroidRuntime(409): at com.app.conekta.Conekta.onStart(Conekta.java:27)
11-16 23:57:41.447: E/AndroidRuntime(409): at android.app.Instrumentation.callActivityOnStart(Instrumentation.java:1129)
11-16 23:57:41.447: E/AndroidRuntime(409): at android.app.Activity.performStart(Activity.java:3723)
11-16 23:57:41.447: E/AndroidRuntime(409): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2468)
11-16 23:57:41.447: E/AndroidRuntime(409): ... 11 more
11-16 23:57:41.467: I/dalvikvm(409): threadid=7: reacting to signal 3
11-16 23:57:41.467: E/dalvikvm(409): Unable to open stack trace file '/data/anr/traces.txt': Permission denied
答案 0 :(得分：1)
尝试更改
Toast.makeText(Conekta.this, fl1.getHeight(), Toast.LENGTH_SHORT).show();
到
Toast.makeText(Conekta.this, String.valueOf(fl1.getHeight()), Toast.LENGTH_SHORT).show();