消息模式Toast.makeText用法

消息模式Toast.makeText用法

Toast用于向用户显示一些帮助/提示。下面我做了5中效果,来说明Toast的强大,定义一个属于你自己的Toast。
1.默认效果



代码

Toast.makeText(getApplicationContext(), "默认Toast样式",
    Toast.LENGTH_SHORT).show();

2.自定义显示位置效果



代码

toast = Toast.makeText(getApplicationContext(),
    "自定义位置Toast", Toast.LENGTH_LONG);
  toast.setGravity(Gravity.CENTER, 0, 0);
   toast.show();

3.带图片效果



代码

toast = Toast.makeText(getApplicationContext(),
    "带图片的Toast", Toast.LENGTH_LONG);
  toast.setGravity(Gravity.CENTER, 0, 0);
   LinearLayout toastView =(LinearLayout) toast.getView();
   ImageView imageCodeProject =new ImageView(getApplicationContext());
  imageCodeProject.setImageResource(R.drawable.icon);
  toastView.addView(imageCodeProject, 0);
   toast.show();

4.完全自定义效果



代码

LayoutInflater inflater = getLayoutInflater();
   View layout =inflater.inflate(R.layout.custom,
    (ViewGroup) findViewById(R.id.llToast));
   ImageView image = (ImageView)layout
    .findViewById(R.id.tvImageToast);
  image.setImageResource(R.drawable.icon);
   TextView title = (TextView)layout.findViewById(R.id.tvTitleToast);
  title.setText("Attention");
   TextView text = (TextView)layout.findViewById(R.id.tvTextToast);
  text.setText("完全自定义Toast");
   toast = newToast(getApplicationContext());
   toast.setGravity(Gravity.RIGHT| Gravity.TOP, 12, 40);
  toast.setDuration(Toast.LENGTH_LONG);
   toast.setView(layout);
   toast.show();

5.其他线程



 代码

new Thread(new Runnable() {
    public voidrun() {
    showToast();
    }
   }).start();

 

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package com.example.myexamproject; import android.os.Bundle; import android.text.TextUtils; import android.view.View; import android.widget.Button; import android.widget.EditText; import android.widget.Toast; import androidx.annotation.Nullable; import androidx.appcompat.app.AppCompatActivity; import com.example.myexamproject.db.UserDbHelper; import com.example.myexamproject.entity.UserInfo; import com.example.myexamproject.utils.MD5Utils; public class UpdatePasswordActivity extends AppCompatActivity { private EditText NewPassword; private EditText SecondPassword; private Button update_password; private String md5_password; String new_password; String second_password; @Override protected void onCreate(@Nullable Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_update_password); init(); } private void init(){ UserInfo userInfo = UserInfo.getsUserInfo(); NewPassword = findViewById(R.id.new_password); SecondPassword = findViewById(R.id.second_password); update_password = findViewById(R.id.update_password); update_password.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View view) { new_password = NewPassword.getText().toString().trim(); second_password = SecondPassword.getText().toString().trim(); if (TextUtils.isEmpty(new_password)){ Toast.makeText(UpdatePasswordActivity.this,"请输入新的密码",Toast.LENGTH_SHORT).show(); }else if (TextUtils.isEmpty(second_password)){ Toast.makeText(UpdatePasswordActivity.this,"请再次输入密码",Toast.LENGTH_SHORT).show(); }else if (TextUtils.equals(new_password,second_password)){ md5_password = MD5Utils.md5(new_password); if(TextUtils.equals(md5_password,userInfo.getPassword())){ Toast.makeText(UpdatePasswordActivity.this,"新密码需与旧密码不一致",Toast.LENGTH_SHORT).show(); }else { int row = UserDbHelper.getInstance(UpdatePasswordActivity.this).updatePassword(userInfo.getUser_id(), md5_password); UserInfo.sUserInfo.setPassword(md5_password); if(row==1){ Toast.makeText(UpdatePasswordActivity.this,"修改成功",Toast.LENGTH_SHORT).show(); finish(); } } }else { Toast.makeText(UpdatePasswordActivity.this,"两次输入密码不一致",Toast.LENGTH_SHORT).show(); } } }); } }
03-19
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