1. 邏輯代碼
1.1 MainActivity 類
package com.example.myapplication;
import android.Manifest;
import android.app.Activity;
import android.app.AlertDialog;
import android.content.DialogInterface;
import android.content.Intent;
import android.content.pm.PackageManager;
import android.graphics.Bitmap;
import android.net.Uri;
import android.os.Bundle;
import androidx.annotation.NonNull;
import androidx.annotation.Nullable;
import androidx.fragment.app.Fragment;
import androidx.navigation.NavController;
import androidx.navigation.Navigation;
import android.os.Parcelable;
import android.provider.MediaStore;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ImageView;
import android.widget.LinearLayout;
import android.widget.TextView;
/**
* A simple {@link Fragment} subclass.
* Use the {@link BlankFragment4#newInstance} factory method to
* create an instance of this fragment.
*/
public class BlankFragment4 extends Fragment {
// TODO: Rename parameter arguments, choose names that match
// the fragment initialization parameters, e.g. ARG_ITEM_NUMBER
private static final String ARG_PARAM1 = "param1";
private static final String ARG_PARAM2 = "param2";
// TODO: Rename and change types of parameters
private String mParam1;
private String mParam2;
private ImageView imageView;// 定義全局的 imageView
private TextView textView; // 昵稱
public BlankFragment4() {
// Required empty public constructor
}
/**
* Use this factory method to create a new instance of
* this fragment using the provided parameters.
*
* @param param1 Parameter 1.
* @param param2 Parameter 2.
* @return A new instance of fragment BlankFragment2.
*/
// TODO: Rename and change types and number of parameters
public static BlankFragment4 newInstance(String param1, String param2) {
BlankFragment4 fragment = new BlankFragment4();
Bundle args = new Bundle();
args.putString(ARG_PARAM1, param1);
args.putString(ARG_PARAM2, param2);
fragment.setArguments(args);
return fragment;
}
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
if (getArguments() != null) {
mParam1 = getArguments().getString(ARG_PARAM1);
mParam2 = getArguments().getString(ARG_PARAM2);
}
}
@Override
public View onCreateView(final LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
// Inflate the layout for this fragment
// 普遍用view
View view = inflater.inflate(R.layout.fragment_blank4, container, false);
// 普遍用view
// TODO 頭像元件
ImageView img = view.findViewById(R.id.imageView);
img.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Log.i("tag","點選換頭像");
// 彈出菜單框 選擇從相機拍照 還是 選擇圖庫
// context : 傳入activity對象
// 使用方法 1.this在activity中 2.activity.this同1 3.在Fragment中使用getActivity()
AlertDialog.Builder dialog = new AlertDialog.Builder(getActivity());
dialog.setItems(new String[]{"拍照", "相冊"},
new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
// 點選後,具體處理,
Log.i("tag","which " + which);
Log.i("tag","dialog " + dialog);
// 判斷 which 進而判斷使用者點選的是第幾個
if (which == 0) {
// 調用系統相機權限 彈出是否同意授權
requestPermissions(new String[]{
Manifest.permission.CAMERA,
Manifest.permission.WRITE_EXTERNAL_STORAGE
},10);// 動态申請權限
} else if (which == 1) {
// 調用系統相機 直接打開
Intent intent = new Intent();
// ACTION_GET_CONTENT = "android.intent.action.GET_CONTENT"
intent.setAction(Intent.ACTION_PICK); // 設定跳轉到相冊
intent.setType("image/*"); // 設定類型 選圖檔
startActivityForResult(intent,3);
}
}
});
dialog.show();
}
});
// TODO 昵稱行元件
// 擷取昵稱
textView = view.findViewById(R.id.save_nick_name);
LinearLayout linearLayout = view.findViewById(R.id.nick_name);
linearLayout.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Log.i("tag","點選換昵稱"); // 調試
Intent intent = new Intent(getActivity(), ChangeNickname.class);
// 跳轉後,當傳回時能傳回資料
startActivityForResult(intent, 2);
}
});
// 全局的 imageView 從 fragment_blank4 執行個體 view 擷取
imageView = view.findViewById(R.id.imageView);
return view;
}
// 動态權限回調 requestCode:10 上面的requestCode
@Override
public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
super.onRequestPermissionsResult(requestCode, permissions, grantResults);
// TODO 相機activity
if (requestCode == 10) { // 系統相機申請權限傳回10
// 判斷使用者是否同意, PERMISSION_GRANTED = 0 : =>同意
if (grantResults[0] == PackageManager.PERMISSION_GRANTED) {
// 調用相機activity
Intent intent = new Intent();
intent.setAction(MediaStore.ACTION_IMAGE_CAPTURE); // 參數="android.media.action.IMAGE_CAPTURE"
startActivityForResult(intent,1); // 相機擷取的資料的傳回值
}
}
}
@Override
public void onActivityResult(int requestCode, int resultCode, @Nullable Intent data) {
super.onActivityResult(requestCode, resultCode, data);
if (requestCode == 1) {
// 相機activity傳回
// 擷取相機傳回的圖檔 bitmap
assert data != null;
Bundle bundle = data.getExtras();
assert bundle != null; // 調試宏,隻在debug模式下有效。如果不滿足條件,就會出現斷言
Bitmap bitmap = bundle.getParcelable("data");
//
imageView.setImageBitmap(bitmap);
} else if (requestCode == 3) {
// 擷取相冊傳回的圖檔 uri對象
// 例子:uri = content://com.google.android.apps.photos.contentprovider/-1/1/content%3A%2F%2Fmedia%2Fexternal%2Fimages%2Fmedia%2F22/ORIGINAL/NONE/609859626
Uri uri = data.getData();
imageView.setImageURI(uri);
}
}
}
2. 布局代碼
2.1 XML 檔案
<?xml version="1.0" encoding="utf-8"?>
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".BlankFragment2">
<!-- TODO: Update blank fragment layout -->
<LinearLayout
android:layout_width="match_parent"
android:layout_height="600dp"
android:orientation="vertical">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="110dp"
android:orientation="horizontal">
<TextView
android:layout_width="0dp"
android:layout_weight="1"
android:layout_height="match_parent"
android:textSize="20dp"
android:text="頭像"
android:gravity="left|center"
android:scaleType="fitXY"
android:padding="20dp"/>
<ImageView
android:id="@+id/imageView"
android:layout_width="80dp"
android:layout_height="80dp"
android:layout_gravity="center"
android:layout_margin="20dp"
android:src="@drawable/avatar" />
</LinearLayout>
<LinearLayout
android:id="@+id/nick_name"
android:layout_width="match_parent"
android:layout_height="110dp"
android:orientation="horizontal">
<TextView
android:layout_width="0dp"
android:layout_weight="1"
android:layout_height="match_parent"
android:textSize="20dp"
android:text="昵稱"
android:gravity="left|center"
android:padding="20dp"
tools:ignore="RtlHardcoded" />
<TextView
android:id="@+id/save_nick_name"
android:layout_width="0dp"
android:layout_weight="1"
android:layout_height="match_parent"
android:textSize="15dp"
android:text="小明"
android:gravity="right|center"
android:padding="20dp"/>
</LinearLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="110dp"
android:orientation="horizontal">
<TextView
android:layout_width="0dp"
android:layout_weight="1"
android:layout_height="match_parent"
android:textSize="20dp"
android:text="微信号"
android:gravity="left|center"
android:padding="20dp"/>
<TextView
android:layout_width="0dp"
android:layout_height="match_parent"
android:layout_weight="1"
android:gravity="right|center"
android:padding="20dp"
android:text="xiaoming"
android:textSize="15dp" />
</LinearLayout>
</LinearLayout>
</FrameLayout>
3.配置代碼
3.1 build.gradle 檔案
apply plugin: 'com.android.application'
android {
compileSdkVersion 30
buildToolsVersion "30.0.2"
defaultConfig {
applicationId "com.example.myapplication"
minSdkVersion 16
targetSdkVersion 30
versionCode 1
versionName "1.0"
testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
}
buildTypes {
release {
minifyEnabled false
proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'
}
}
}
// 指定目前項目的所有依賴關系:本地依賴、庫依賴、遠端依賴
dependencies {
implementation fileTree(dir: "libs", include: ["*.jar"]) // 本地依賴
implementation 'androidx.appcompat:appcompat:1.2.0'
implementation 'androidx.constraintlayout:constraintlayout:2.0.1'
implementation 'androidx.legacy:legacy-support-v4:1.0.0'
implementation 'androidx.navigation:navigation-fragment:2.1.0'
implementation 'androidx.navigation:navigation-ui:2.1.0'
testImplementation 'junit:junit:4.12' // 測試用例庫
androidTestImplementation 'androidx.test.ext:junit:1.1.2'
androidTestImplementation 'androidx.test.espresso:espresso-core:3.3.0'
}
3.2 AndroidManifest.xml 檔案
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.myapplication">
<application
android:allowBackup="true"
android:icon="@mipmap/ic_launcher"
android:label="@string/app_name"
android:networkSecurityConfig="@xml/network_config"
android:roundIcon="@mipmap/ic_launcher_round"
android:supportsRtl="true"
android:theme="@style/AppTheme.NoActionBar">
<activity android:name=".MainActivity3">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<activity android:name=".MainActivity2" />
<activity android:name=".MainActivity" />
</application>
<!-- 配置相機權限 -->
<uses-permission android:name="android.permission.CAMERA"/>
<!-- 配置相機權限 -->
</manifest>