android showmessage

package com.example.yanlei.yl6;
import android.annotation.TargetApi;
import android.app.Activity;
import android.app.AlertDialog;
import android.content.DialogInterface;
import android.content.pm.ApplicationInfo;
import android.content.pm.PackageManager;
import android.os.Build;
import android.os.Bundle;
import android.os.Handler;
import android.view.MotionEvent;
import android.view.View;
import android.widget.Toast;
public void ShowMessage(String str) {
        Toast.makeText(this, str, Toast.LENGTH_LONG).show();

    }

    public String getApplicationName() {
        PackageManager packageManager = null;
        ApplicationInfo applicationInfo = null;
        try {
            packageManager = getApplicationContext().getPackageManager();
            applicationInfo = packageManager.getApplicationInfo(getPackageName(), 0);
        } catch (PackageManager.NameNotFoundException e) {
            applicationInfo = null;
        }
        String applicationName =
                (String) packageManager.getApplicationLabel(applicationInfo);
        return applicationName;
    }

    public void ShowMessage1(String str) {
        new AlertDialog.Builder(this)
                .setTitle(getApplicationName())
                .setMessage(str)
                .show();

    }

    public void ShowMessage2(String str) { //
        new AlertDialog.Builder(this)
                .setMessage(str)
                .setPositiveButton("确定",
                        new DialogInterface.OnClickListener() {
                            public void onClick(DialogInterface dialoginterface, int i) {
                                //按钮事件
                            }
                        })
                .show();
    }

    public void ShowMessage3(String str) { //

        new AlertDialog.Builder(this)
                .setTitle("提示")
                .setMessage(str)
                .setIcon(R.drawable.quit)
                .setPositiveButton("确定", new DialogInterface.OnClickListener() {
                    public void onClick(DialogInterface dialog, int whichButton) {
                        setResult(RESULT_OK);//确定按钮事件
                        finish();
                    }
                })
                .setNegativeButton("取消", new DialogInterface.OnClickListener() {
                    public void onClick(DialogInterface dialog, int whichButton) {
                        //取消按钮事件
                    }
                })
                .show();

    }