1、AlertDialog
AlertDialog是一种对话框,他弹出时是凌驾于所有的界面元素之上的,能够屏蔽其他控件的交互能力。因此,AlertDialog 一般是用于提示非常重要的事情和紧急的事件。
AlertDialog.Builder dialog = new AlertDialog.Builder(MainActivity.this);
dialog.setTitle("这是标题");
dialog.setMessage("这是正文");
dialog.setCancelable(false);
dialog.setPositiveButton("确定", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
dialog.dismiss();
}
});
dialog.setNegativeButton("取消", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
}
});
dialog.show();
效果如图:
2、ProgressDialog
ProgressDialog和AlertDialog很类似,都是在界面上弹出一个对话框,唯一的区别是ProgressDialog比AlertDialog多了一个进度条,所以通常可以用来表示一些耗时的操作,比如下载什么的。
progressDialog.setCancelable(true);表示可以通过点击手机右下角的返回键关闭对话框。
progressDialog.setCanceledOnTouchOutside(true);
表示可以通过点击空白处关闭对话框。
代码如下:
ProgressDialog progressDialog = new ProgressDialog(MainActivity.this);
progressDialog.setTitle("这是标题");
progressDialog.setMessage("正在加载中。。。");
progressDialog.setCancelable(true);
progressDialog.setCanceledOnTouchOutside(true);
progressDialog.show();
效果如图:
完整代码如下:
MainActivity.java
package test.abby.com.animtest;
import android.app.AlertDialog;
import android.app.ProgressDialog;
import android.content.DialogInterface;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuInflater;
import android.view.View;
import android.view.animation.Animation;
import android.view.animation.AnimationUtils;
import android.widget.TextView;
public class MainActivity extends AppCompatActivity {
private TextView mTvTest1;
private TextView mTvTest2;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
bindView();
initDialog();
}
private void bindView(){
mTvTest1 = (TextView) findViewById(R.id.text1);
mTvTest2 = (TextView) findViewById(R.id.text2);
}
private void initDialog(){
mTvTest1.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
AlertDialog.Builder dialog = new AlertDialog.Builder(MainActivity.this);
dialog.setTitle("这是标题");
dialog.setMessage("这是正文");
dialog.setCancelable(false);
dialog.setPositiveButton("确定", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
dialog.dismiss();
}
});
dialog.setNegativeButton("取消", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
}
});
dialog.show();
}
});
mTvTest2.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
ProgressDialog progressDialog = new ProgressDialog(MainActivity.this);
progressDialog.setTitle("这是标题");
progressDialog.setMessage("正在加载中。。。");
progressDialog.setCancelable(true);
progressDialog.setCanceledOnTouchOutside(true);
progressDialog.show();
}
});
}
}
activity_main.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout 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:orientation="vertical"
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="test.abby.com.animtest.MainActivity">
<TextView
android:id="@+id/text1"
android:layout_gravity="center"
android:layout_weight="1"
android:gravity="center"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="AlertDialog!" />
<TextView
android:id="@+id/text2"
android:layout_gravity="center"
android:layout_weight="1"
android:gravity="center"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="ProgressDialog!" />
</LinearLayout>