想用布局嵌套的方法做QQ的登陆界面,但总是运行不了
主activity:
package com.example.testlayout;
import android.app.Activity;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
public class MainActivity extends Activity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.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();
if (id == R.id.action_settings) {
return true;
}
return super.onOptionsItemSelected(item);
}
}
xml文件
<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:paddingBottom="@dimen/activity_vertical_margin"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
tools:context="com.example.testlayout.MainActivity" >
<LinearLayout
android:id="@+id/LL1"
android:orientation="horizontal">
<EditText
android:id="@+id/account"
android:layout_height="wrap_content"
android:layout_width="1dp"
android:layout_weight="4"
android:layout_gravity="start"
android:hint="@string/account"
android:inputType="textEmailAddress|number"
/>
<TextView
android:layout_height="wrap_content"
android:layout_weight="1"
android:layout_width="1dp"
android:text="@string/registor"
/>
</LinearLayout>
<LinearLayout
android:id="@+id/LL2"
android:layout_below="@id/LL1"
android:orientation="horizontal">
<EditText
android:id="@+id/password"
android:layout_height="wrap_content"
android:layout_width="1dp"
android:layout_weight="4"
android:layout_gravity="start"
android:hint="@string/passsword"
android:inputType="textPassword"
/>
<TextView
android:layout_height="wrap_content"
android:layout_weight="1"
android:layout_width="1dp"
android:text="@string/findback"
/>
</LinearLayout>
<LinearLayout
android:id="@+id/LL3"
android:layout_below="@id/LL2"
android:orientation="horizontal">
<CheckBox
android:id="@+id/CTV1"
android:layout_gravity="start"
/>
<TestView
android:id="@+id/TV1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="@string/rememberpassword"
/>
<CheckBox
/>
<TextView
android:id="@+id/TV2"
android:layout_alignLeft="@id/password"
android:text="@string/autosignin"
/>
</LinearLayout>
</RelativeLayout>
string文件
<?xml version="1.0" encoding="utf-8"?>
<resources>
<string name="app_name">testlayout</string>
<string name="account">QQ号码/手机/邮箱</string>
<string name="passsword">密码</string>
<string name="registor">注册账号</string>
<string name="findback">找回密码</string>
<string name="autosignin">自动登录</string>
<string name="signin">登录</string>
<string name="rememberpassword">记住密码</string>
<string name="action_settings">Settings</string>
</resources>
logcat中的错误:
11-09 11:10:17.163: E/AndroidRuntime(2101): FATAL EXCEPTION: main
11-09 11:10:17.163: E/AndroidRuntime(2101): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.testlayout/com.example.testlayout.MainActivity}: java.lang.RuntimeException: Binary XML file line #11: You must supply a layout_width attribute.
11-09 11:10:17.163: E/AndroidRuntime(2101): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2059)
11-09 11:10:17.163: E/AndroidRuntime(2101): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2084)
11-09 11:10:17.163: E/AndroidRuntime(2101): at android.app.ActivityThread.access$600(ActivityThread.java:130)
11-09 11:10:17.163: E/AndroidRuntime(2101): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1195)
11-09 11:10:17.163: E/AndroidRuntime(2101): at android.os.Handler.dispatchMessage(Handler.java:99)
11-09 11:10:17.163: E/AndroidRuntime(2101): at android.os.Looper.loop(Looper.java:137)
11-09 11:10:17.163: E/AndroidRuntime(2101): at android.app.ActivityThread.main(ActivityThread.java:4745)
11-09 11:10:17.163: E/AndroidRuntime(2101): at java.lang.reflect.Method.invokeNative(Native Method)
11-09 11:10:17.163: E/AndroidRuntime(2101): at java.lang.reflect.Method.invoke(Method.java:511)
11-09 11:10:17.163: E/AndroidRuntime(2101): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:786)
11-09 11:10:17.163: E/AndroidRuntime(2101): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553)
11-09 11:10:17.163: E/AndroidRuntime(2101): at dalvik.system.NativeStart.main(Native Method)
11-09 11:10:17.163: E/AndroidRuntime(2101): Caused by: java.lang.RuntimeException: Binary XML file line #11: You must supply a layout_width attribute.
11-09 11:10:17.163: E/AndroidRuntime(2101): at android.content.res.TypedArray.getLayoutDimension(TypedArray.java:491)
11-09 11:10:17.163: E/AndroidRuntime(2101): at android.view.ViewGroup$LayoutParams.setBaseAttributes(ViewGroup.java:5456)
11-09 11:10:17.163: E/AndroidRuntime(2101): at android.view.ViewGroup$MarginLayoutParams.<init>(ViewGroup.java:5592)
11-09 11:10:17.163: E/AndroidRuntime(2101): at android.widget.RelativeLayout$LayoutParams.<init>(RelativeLayout.java:1099)
11-09 11:10:17.163: E/AndroidRuntime(2101): at android.widget.RelativeLayout.generateLayoutParams(RelativeLayout.java:956)
11-09 11:10:17.163: E/AndroidRuntime(2101): at android.widget.RelativeLayout.generateLayoutParams(RelativeLayout.java:70)
11-09 11:10:17.163: E/AndroidRuntime(2101): at android.view.LayoutInflater.rInflate(LayoutInflater.java:748)
11-09 11:10:17.163: E/AndroidRuntime(2101): at android.view.LayoutInflater.inflate(LayoutInflater.java:489)
11-09 11:10:17.163: E/AndroidRuntime(2101): at android.view.LayoutInflater.inflate(LayoutInflater.java:396)
11-09 11:10:17.163: E/AndroidRuntime(2101): at android.view.LayoutInflater.inflate(LayoutInflater.java:352)
11-09 11:10:17.163: E/AndroidRuntime(2101): at com.android.internal.policy.impl.PhoneWindow.setContentView(PhoneWindow.java:256)
11-09 11:10:17.163: E/AndroidRuntime(2101): at android.app.Activity.setContentView(Activity.java:1867)
11-09 11:10:17.163: E/AndroidRuntime(2101): at com.example.testlayout.MainActivity.onCreate(MainActivity.java:13)
11-09 11:10:17.163: E/AndroidRuntime(2101): at android.app.Activity.performCreate(Activity.java:5008)
11-09 11:10:17.163: E/AndroidRuntime(2101): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1079)
11-09 11:10:17.163: E/AndroidRuntime(2101): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2023)
11-09 11:10:17.163: E/AndroidRuntime(2101): ... 11 more