android操作栏崩溃应用程序上的后退按钮
语法:我有3个活动(LoginActivity、MainActivity和EditProfileActivity)。在我的LoginActivity中登录Facebook后,我启动主要活动。(到目前为止,应用程序工作完全正确,没有错误)。我有一个用于导航的NavigationDrawer,当我从NavigationDrawer单击编辑配置文件链接时,它将启动EditProfile活动 问题:当我单击顶部蓝色栏中的左箭头时,应用程序崩溃 请看图片: main活动 导航抽屉 EditProfileActivity 单击左上箭头时应用程序崩溃 这是我的Manifest.xmlandroid操作栏崩溃应用程序上的后退按钮,android,Android,语法:我有3个活动(LoginActivity、MainActivity和EditProfileActivity)。在我的LoginActivity中登录Facebook后,我启动主要活动。(到目前为止,应用程序工作完全正确,没有错误)。我有一个用于导航的NavigationDrawer,当我从NavigationDrawer单击编辑配置文件链接时,它将启动EditProfile活动 问题:当我单击顶部蓝色栏中的左箭头时,应用程序崩溃 请看图片: main活动 导航抽屉 EditProfil
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.example">
<uses-permission android:name="android.permission.INTERNET" />
<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">
<meta-data
android:name="com.facebook.sdk.ApplicationId"
android:value="@string/facebook_app_id" />
<activity
android:name="com.facebook.FacebookActivity"
android:configChanges="keyboard|keyboardHidden|screenLayout|screenSize|orientation"
android:label="@string/app_name" />
<activity
android:name="com.facebook.CustomTabActivity"
android:exported="true">
<intent-filter>
<action android:name="android.intent.action.VIEW" />
<category android:name="android.intent.category.DEFAULT" />
<category android:name="android.intent.category.BROWSABLE" />
<data android:scheme="@string/fb_login_protocol_scheme" />
</intent-filter>
</activity>
<activity android:name=".LoginActivity">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<provider
android:name="com.facebook.FacebookContentProvider"
android:authorities="com.facebook.app.FacebookContentProvider"
android:exported="true" />
<activity
android:name=".MainActivity"
android:label="@string/title_activity_main"
android:theme="@style/AppTheme.NoActionBar">
</activity>
<activity android:name=".EditProfileActivity"
android:parentActivityName=".MainActivity" >
<!-- The meta-data tag is required if you support API level 15 and lower -->
<meta-data
android:name="android.support.PARENT_ACTIVITY"
android:value=".MainActivity" />
</activity>
</application>
</manifest>
这是我的MainActivity.java
包com.example.example
import android.content.Intent;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.os.AsyncTask;
import android.os.Bundle;
import android.support.design.widget.FloatingActionButton;
import android.support.design.widget.Snackbar;
import android.util.Log;
import android.view.View;
import android.support.design.widget.NavigationView;
import android.support.v4.view.GravityCompat;
import android.support.v4.widget.DrawerLayout;
import android.support.v7.app.ActionBarDrawerToggle;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.Toolbar;
import android.view.Menu;
import android.view.MenuItem;
import android.widget.ImageView;
import android.widget.TextView;
import java.io.InputStream;
public class MainActivity extends AppCompatActivity
implements NavigationView.OnNavigationItemSelectedListener {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
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();
}
});
DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
ActionBarDrawerToggle toggle = new ActionBarDrawerToggle(
this, drawer, toolbar, R.string.navigation_drawer_open, R.string.navigation_drawer_close);
drawer.setDrawerListener(toggle);
toggle.syncState();
NavigationView navigationView = (NavigationView) findViewById(R.id.nav_view);
navigationView.setNavigationItemSelectedListener(this);
}
@Override
public void onBackPressed() {
DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
if (drawer.isDrawerOpen(GravityCompat.START)) {
drawer.closeDrawer(GravityCompat.START);
} else {
super.onBackPressed();
}
}
@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);
Bundle inBundle = getIntent().getExtras();
String first_name = inBundle.get("first_name").toString();
String last_name = inBundle.get("last_name").toString();
String imageUrl = inBundle.get("imageUrl").toString();
TextView nameView = (TextView)findViewById(R.id.nameView);
nameView.setText("" + first_name + " " + last_name);
new DownloadImage((ImageView)findViewById(R.id.imageView)).execute(imageUrl);
return true;
}
public class DownloadImage extends AsyncTask<String, Void, Bitmap> {
ImageView bmImage;
public DownloadImage(ImageView bmImage) {
this.bmImage = bmImage;
}
protected Bitmap doInBackground(String... urls) {
String urldisplay = urls[0];
Bitmap mIcon11 = null;
try {
InputStream in = new java.net.URL(urldisplay).openStream();
mIcon11 = BitmapFactory.decodeStream(in);
} catch (Exception e) {
Log.e("Error", e.getMessage());
e.printStackTrace();
}
return mIcon11;
}
protected void onPostExecute(Bitmap result) {
bmImage.setImageBitmap(result);
}
}
@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);
}
@SuppressWarnings("StatementWithEmptyBody")
@Override
public boolean onNavigationItemSelected(MenuItem item) {
// Handle navigation view item clicks here.
int id = item.getItemId();
if (id == R.id.nav_camera) {
// Handle the camera action
} else if (id == R.id.nav_gallery) {
} else if (id == R.id.nav_slideshow) {
} else if (id == R.id.nav_manage) {
} else if (id == R.id.nav_share) {
} else if (id == R.id.nav_send) {
} else if(id == R.id.nav_user_edit){
Intent intent = new Intent(this, EditProfileActivity.class);
startActivity(intent);
}
DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
drawer.closeDrawer(GravityCompat.START);
return true;
}
}
导入android.content.Intent;
导入android.graphics.Bitmap;
导入android.graphics.BitmapFactory;
导入android.os.AsyncTask;
导入android.os.Bundle;
导入android.support.design.widget.FloatingActionButton;
导入android.support.design.widget.Snackbar;
导入android.util.Log;
导入android.view.view;
导入android.support.design.widget.NavigationView;
导入android.support.v4.view.GravityCompat;
导入android.support.v4.widget.DrawerLayout;
导入android.support.v7.app.ActionBarDrawerToggle;
导入android.support.v7.app.AppActivity;
导入android.support.v7.widget.Toolbar;
导入android.view.Menu;
导入android.view.MenuItem;
导入android.widget.ImageView;
导入android.widget.TextView;
导入java.io.InputStream;
公共类MainActivity扩展了AppCompatActivity
实现NavigationView.OnNavigationItemSelectedListener{
@凌驾
创建时受保护的void(Bundle savedInstanceState){
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Toolbar Toolbar=(Toolbar)findViewById(R.id.Toolbar);
设置支持操作栏(工具栏);
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();
}
});
抽屉布局抽屉=(抽屉布局)findViewById(R.id.抽屉布局);
ActionBarDrawerToggle切换=新建ActionBarDrawerToggle(
这,抽屉,工具栏,R.string.navigation\u drawer\u open,R.string.navigation\u drawer\u close);
抽屉。设置抽屉定位器(开关);
toggle.syncState();
NavigationView NavigationView=(NavigationView)findViewById(R.id.nav_视图);
navigationView.setNavigationItemSelectedListener(此);
}
@凌驾
public void onBackPressed(){
抽屉布局抽屉=(抽屉布局)findViewById(R.id.抽屉布局);
if(抽屉isDrawerOpen(重力压缩机启动)){
抽屉。关闭抽屉(重力压缩机启动);
}否则{
super.onBackPressed();
}
}
@凌驾
公共布尔onCreateOptions菜单(菜单){
//为菜单充气;这会将项目添加到操作栏(如果存在)。
getMenuInflater().充气(R.menu.main,menu);
Bundle inBundle=getIntent().getExtras();
String first_name=inBundle.get(“first_name”).toString();
字符串last_name=inBundle.get(“last_name”).toString();
字符串imageUrl=inBundle.get(“imageUrl”).toString();
TextView nameView=(TextView)findViewById(R.id.nameView);
nameView.setText(“+first\u name+”“+last\u name”);
新下载图像((ImageView)findViewById(R.id.ImageView)).execute(imageUrl);
返回true;
}
公共类DownloadImage扩展异步任务{
图像视图bmImage;
公共下载图像(ImageView bmImage){
this.bmImage=bmImage;
}
受保护位图doInBackground(字符串…URL){
字符串urldisplay=url[0];
位图mIcon11=null;
试一试{
InputStream in=newjava.net.URL(urldisplay.openStream();
mIcon11=BitmapFactory.decodeStream(in);
}捕获(例外e){
Log.e(“Error”,e.getMessage());
e、 printStackTrace();
}
返回mIcon11;
}
受保护的void onPostExecute(位图结果){
bmImage.setImageBitmap(结果);
}
}
@凌驾
公共布尔值onOptionsItemSelected(菜单项项){
//处理操作栏项目单击此处。操作栏将
//自动处理Home/Up按钮上的点击,只要
//在AndroidManifest.xml中指定父活动时。
int id=item.getItemId();
//noinspection SimplifiableIf语句
if(id==R.id.action\u设置){
返回true;
}
返回super.onOptionsItemSelected(项目);
}
@SuppressWarnings(“StatementWithEmptyBody”)
@凌驾
公共布尔值onNavigationItemSelected(MenuItem项){
//处理导航视图项单击此处。
int id=item.getItemId();
if(id==R.id.nav_摄像机){
//处理相机的动作
}否则如果(id==R.id.nav_画廊){
}else if(id==R.id.nav_幻灯片){
}else if(id==R.id.nav_manage){
}else if(id==R.id.nav_共享){
}else if(id==R.id.nav_send){
}else if(id==R.id.nav\u user\u edit){
意向意向=新意向(本版)
<meta-data
android:name="android.support.PARENT_ACTIVITY"
android:value="fully qualified activity name" />
getSupportActionBar().setHomeButtonEnabled(true);
getSupportActionBar().setDisplayHomeAsUpEnabled(true);
if (id==android.R.id.home)
{
NavUtils.navigateUpFromSameTask(this);
}
<ImageView
android:id="@+id/tv_header_title2"
android:layout_width="25dp"
android:layout_height="wrap_content"
android:layout_gravity="left"
android:src="@drawable/backbutton"
android:layout_marginLeft="15dp"/>
ImageView img= (ImageView) findViewById(R.id.tv_header_title2);
and
img.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
finish();
}
});