单击“提交”按钮时,我会尝试显示ProgessBar。它会在数据加载完成后隐藏。但是,progressBar并没有覆盖整个屏幕。相反,它被Button覆盖了。请参考截图,它应该更容易理解我的意思。
我想要实现的是屏幕截图的底部。
Main4Activity.java
public class Main4Activity extends AppCompatActivity {
ProgressBar progressBar;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main4);
progressBar = (ProgressBar) findViewById(R.id.progressBar);
progressBar.setVisibility(View.GONE);
final EditText username=(EditText)findViewById(R.id.username);
final EditText email=(EditText)findViewById(R.id.email);
final EditText password=(EditText)findViewById(R.id.password);
final Button submit=(Button)findViewById(R.id.submit);
submit.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
progressBar.setVisibility(View.VISIBLE);
final String get_username=username.getText().toString();
final String get_email=email.getText().toString();
final String get_password=password.getText().toString();
Response.Listener<String> response_listener=new Response.Listener<String>() {
@Override
public void onResponse(String response) {
try{
JSONObject jsonObject=new JSONObject(response);
boolean result=jsonObject.getBoolean("register_result");
progressBar.setVisibility(View.GONE);
if(result){
AlertDialog.Builder builder=new AlertDialog.Builder(Main4Activity.this);
builder.setMessage("Registration Done!")
.setNegativeButton("Back",null)
.create()
.show();
}else{
AlertDialog.Builder builder=new AlertDialog.Builder(Main4Activity.this);
builder.setMessage("User already existed! Please try different Email")
.setNegativeButton("Back",null)
.create()
.show();
}
}catch(JSONException e){
e.printStackTrace();;
}
}
};
register_request register_request=new register_request(get_username,get_email,get_password,response_listener);
RequestQueue queue=Volley.newRequestQueue(Main4Activity.this);
queue.add(register_request);
}
});
TextView register=(TextView)findViewById(R.id.login);
register.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
Intent intent=new Intent(Main4Activity.this,login_activity.class);
Main4Activity.this.startActivity(intent);
}
});
}
}
XML
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="fill_parent"
android:layout_height="fill_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.collection_tutorial.Main4Activity"
android:orientation="vertical">
<ProgressBar
style="?android:attr/progressBarStyleLarge"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="@+id/progressBar"
android:layout_centerVertical="true"
android:layout_centerHorizontal="true"
android:indeterminate="false"
android:layout_gravity="center" />
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="match_parent">
<EditText
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:id="@+id/password"
android:layout_below="@+id/email"
android:layout_centerHorizontal="true"
android:hint="Password"
android:layout_margin="10dp" />
<EditText
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:id="@+id/username"
android:layout_alignParentTop="true"
android:layout_centerHorizontal="true"
android:hint="UserName / Restaurant Name"
android:layout_margin="10dp" />
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textAppearance="?android:attr/textAppearanceMedium"
android:text="Existing User? Please Login here->"
android:id="@+id/login"
android:layout_below="@+id/submit"
android:layout_centerHorizontal="true"
android:layout_margin="10dp" />
<Button
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="Submit Registration"
android:id="@+id/submit"
android:layout_below="@+id/password"
android:layout_centerHorizontal="true"
android:layout_margin="10dp" />
<EditText
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:id="@+id/email"
android:layout_below="@+id/username"
android:layout_centerHorizontal="true"
android:hint="Email "
android:layout_margin="10dp" />
</RelativeLayout>
我尝试将进度条和3个Edittext和按钮放入相同的Relativelayout,它也不起作用。有人可以帮忙吗?
答案 0 :(得分:3)
首先,我将为您的内部RelativeLayout分配一个ID:
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:id="@+id/container"
>
现在,我可以在代码中引用RelativeLayout,我将添加一个新字段:
ProgressBar progressBar;
RelativeLayout container;
然后onClick我将隐藏你的容器:
@Override public void onClick(View view) {
progressBar.setVisibility(View.VISIBLE);
container.setVisibility(View.GONE); ...
在任务完成后让它可见:
@Override public void onResponse(String response) {
try {
JSONObject jsonObject = new JSONObject(response);
boolean result = jsonObject.getBoolean("register_result");
progressBar.setVisibility(View.GONE);
container.setVisibility(View.VISIBLE);...
希望它有所帮助。
但是,我不推荐所有应用中的用户体验。还有其他机制可以通知用户,检查材料设计指南:
https://material.google.com/components/progress-activity.html
顺便说一句,我测试了代码,它的工作方式与您提到的方式相符。这是代码的要点,但是如果你使用代码片段会更好,因为我重命名了几个变量:
https://gist.github.com/moxi/396b073f9df063dc3c943579c93f1be9
查看此gif的结果: https://giphy.com/gifs/uAAYE6j9hy6dy