Java Can';不要在活动之间导航
我有两个Java Can';不要在活动之间导航,java,android,android-activity,floating-action-button,Java,Android,Android Activity,Floating Action Button,我有两个活动,试图通过按下按钮从第一个活动导航到第二个活动。第一个是这样的: protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_first); FloatingActionButton fab = (FloatingActionButton) findViewById(R.id
活动
,试图通过按下按钮从第一个活动导航到第二个活动。第一个是这样的:
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_first);
FloatingActionButton fab = (FloatingActionButton) findViewById(R.id.fab_new_message);
fab.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Intent myIntent = new Intent(FirstActivity.this, SecondActivity.class);
startActivity(myIntent);
}
});
}
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_second);
// other stuff
}
第二个是这样的:
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_first);
FloatingActionButton fab = (FloatingActionButton) findViewById(R.id.fab_new_message);
fab.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Intent myIntent = new Intent(FirstActivity.this, SecondActivity.class);
startActivity(myIntent);
}
});
}
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_second);
// other stuff
}
当按下浮动操作按钮时,绝对不会发生任何事情。我的代码有什么问题
更新:这是清单:
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="...">
<application
android:allowBackup="true"
android:icon="@mipmap/ic_launcher"
android:label="@string/app_name"
android:roundIcon="@mipmap/ic_launcher_round"
android:supportsRtl="true"
android:theme="@style/AppTheme">
<activity android:name=".firstActivity">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<activity android:name="secondActivity"></activity>
</application>
</manifest>
在XML中:
<android.support.design.widget.FloatingActionButton
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:clickable="true"
android:id="@+id/fab"
android:tint="@android:color/white"
android:layout_alignParentBottom="true"
android:layout_alignParentEnd="true"
app:fabSize="mini"
android:layout_alignParentRight="true" />
整个布局:
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:id="@+id/activity_main"
android:layout_width="match_parent"
android:layout_height="match_parent">
<android.support.design.widget.FloatingActionButton
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:clickable="true"
android:id="@+id/fab"
android:tint="@android:color/white"
android:layout_alignParentBottom="true"
android:layout_alignParentEnd="true"
app:fabSize="mini"
android:layout_alignParentRight="true" />
<ListView
android:id="@+id/list_of_messages"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_alignParentBottom="true"
android:layout_alignParentLeft="true"
android:layout_alignParentStart="true"
android:layout_alignParentTop="true"
android:clickable="true"
android:divider="@android:color/transparent"
android:dividerHeight="16dp"
android:focusable="auto"
android:focusableInTouchMode="true" />
</RelativeLayout>
尝试在
Manifest.xml
文件中更改此选项:
<application
android:allowBackup="true"
android:icon="@mipmap/ic_launcher"
android:label="@string/app_name"
android:roundIcon="@mipmap/ic_launcher_round"
android:supportsRtl="true"
android:theme="@style/AppTheme">
<activity android:name=".FirstActivity">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<activity android:name=".SecondActivity"></activity>
</application>
使用以下代码解决您的问题,为我工作:
FloatingActionButton fab = (FloatingActionButton) findViewById(R.id.fab);
fab.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
Snackbar.make(view, "Replace with your own action", Snackbar.LENGTH_LONG)
.setAction("Action", null).show();
}
});
<android.support.design.widget.FloatingActionButton
android:id="@+id/fab"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="bottom|end"
android:layout_margin="@dimen/fab_margin"
app:srcCompat="@android:drawable/ic_dialog_email" />
FloatingActionButton fab=(FloatingActionButton)findViewById(R.id.fab);
fab.setOnClickListener(新视图.OnClickListener(){
@凌驾
公共void onClick(视图){
Snackbar.make(查看“替换为您自己的操作”,Snackbar.LENGTH\u LONG)
.setAction(“Action”,null).show();
}
});
签入您的清单,如果您添加了SecondActivity
您在AndroidManifest.xml中没有SecondActivity条目,您是否在清单中添加了SecondActivity?我想我该撞车了。但你是在暗示什么都没有发生?分享你的宣言我想建议你首先打印“点击登录”,这样你就可以注意到“点击”功能是否与@global_warning一起工作。如果这是一个明显的问题,它会崩溃,而不是“什么都不做”.是的,那是真的,但至少舱单是不正确的,问题变得一团糟+没有stacktrace的迹象。